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21 Cards in this Set
- Front
- Back
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Coplanar
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points in the same plane
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collinear
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points on the same line
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Segment Length euclid's ruler postulate [proof rule]
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Points on a line can be matched one to one with real values
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Segment congruence
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line AB + line CD are congruent if and only if AB = CD
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The property of betweeness [only reffered to with lines]
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Give points A, B, and C, point B is between A and C if and only if line AB + line BC = line AC
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Distance Formula
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d= (x +x ) + (y +y )
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Midpoint Formula
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M= x +x , y +y
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Angle Bisector
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line BD bisects ABC if and only if angle ABD= angle DBC
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Segment Bisector
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Given segment AB with midpoint M, line n is called a bisector of AB if and only if it intersects AB at point M only
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Congruent has........
Equals has...... |
hats (AB=CD) {line segments}
no hats (5=5) {measures/degrees} |
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Isoceles triangle
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two sides of equal length
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Scalene triangle
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zero sides of equal length
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equilateral triangle
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all sides of equal length
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Adjacent angles
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next to each other
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Acute angle
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angle less than 90 degrees
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Obtuse Angle
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angle more than 90 degrees
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straight angle
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[line] angle of 0 degrees
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Right angle
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two perpendicular lines form 90 degree angle
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complementary angle
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angles must add to 90 degrees
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supplementary angle
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angles must add to 180 degrees
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Vertical angles
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angles that lie across each other (opposite angles are equal)
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