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68 Cards in this Set
- Front
- Back
Geometry
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the mathematical study of space and objects in space
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Protractor
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a tool used to measure angles
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Coordinate Grid
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a device for locating points in a plane using ordered numbered pairs, or coordinates
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Compass
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a tool used to draw circles
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Endpoints
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a point at the end of a line segment or ray. A line segment is normally named using the letter labels of its endpoints
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Degree
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unit of measure used for the size of an angle
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Line Segment
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a straight path joining two points
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Line
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a straight path that extends infinitely in opposite directions
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Ray
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a straight path that extends infinitely from its endpoint
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Intersect
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lines that meet
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Parallel
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two lines, line segments, or rays, next to each other that can never cross
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Perpendicular
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two lines that intersect at right angles
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Right Angle
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a 90 degree angle
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Obtuse Angle
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an angle between 90 & 180 degrees
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Acute Angle
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an angle between 0 & 90 degrees
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straight angle
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an angle that measures 180 degrees
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reflex angle
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an angle between 180 and 360 degrees
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vertex
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the point where the rays of an angle, the sides of a polygon, or the sides of a polyhedron meet
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polygon
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a 2 demensional figure with 3 or more sides. All sides must be closed and none curved.
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regular polygon
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a polygon with all sides and angles the same size
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interior
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the inside
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convex
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all sides pushed out
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concave
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all sides pushed in
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side
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one of the line segments that makes up a polygon
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triangle
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a polygon with three sides
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quadirlateral
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a polygon with four sides
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pentagon
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a polygon with five sides
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hexagon
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a polygon with six sides
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heptagon
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a polygon with seven sides
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ocgtagon
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a polygon with eight sides
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nonagon
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a polygon with nine sides
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decagon
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a polygon with ten sides
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scalene triangle
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a triangle with all sides different
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isosceles triangle
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a triangle with two sides are the same
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equilateral triangle
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a triangle with three sides the same
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right triangle
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a triangle with a right angle
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acute triangle
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a triangle with all angles are acute
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obtuse triangle
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a triangle with one obtuse angle
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parallelogram
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a quadrilateral shape with two parallel sides
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trapezoid
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a quadrilateral shape with one pair of parallel sides
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rhombus
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a quadrilateral shape with all sides the same length
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rectangle
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a parallelogram with four right angles
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square
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a parallelogram with four equal sides and angles
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kite
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a quadrilateral with two pairs of adjacent equal sides. The sides cannot be of equal length, so a rhombus cannot be a kite.
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radius
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connects the center of the circle with any point on the circle
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diameter
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passes through the circle and has endpoints on the circle
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center
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middle of the circle
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arc
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part of the outline of a circle
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face
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a flat surface
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edge
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where surfaces meet
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base
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the bottom
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cube
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a polyhedron with six square faces, 12 vertices and 8 edges
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triangular prism
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a prism whose bases are triangles
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rectangular prism
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prism with rectangular bases
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cone
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a three dimensional shape with a circular base and one vertex called the apex
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pyramid
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traingular prism or tetrahedron
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cylinder
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a three dimensional shape that has two circular bases that are parallel and conguant and connected by a curved surface.
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sphere
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a set of all points in space a given distance from a given point. The given point is the center of the sphere, the given distance is the radius.
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congruent
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exactly the same shape and size
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similar
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exactly the same shape but not necissarily the same size
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symmetry
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the same
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line of symmetry
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line drawn through a figure
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image
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reflection of an object
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pre-image
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the original image before a transformation
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reflection
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the flipping of a figure over a line
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rotation
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turns
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transition
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a movement of a figure along a straight line
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transformation
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an operation on a figure that produces another figure
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