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| The union of two rays that have the same endpoint. |
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| the point of intersection of the two sides of an angle |
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| Two non-straight and non-0 angles are adjacent if and only if a common side is interior to the angle formed by the non-common sides |
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| If and only if m1 + m2 = 90 |
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| If and only if m1 + m2 = 180 |
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| When there are two angles and they have the same measurements |
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| Two co-planer lines that have no points in common, or are identical |
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| two lines that form a 90 degree angle |
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| two non-straight and non-0 angles who's sides form two line that are congruent |
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| Any pair of angles in similar location with respect to the transversal and each line |
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| Alternate Interior Angles |
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| angles inside two lines on opposite sides of the transversal |
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| Alternate Exterior Angles |
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| Angles outside two lines on the opposite sides of the transversal |
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| If and only if m = 90 degress |
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| Two non-straight and non-zero angles |
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| Three angles of a triangle add up to ______. |
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Isometries are transformations in which each preimage is congruent to its image.
Example: Moving book from one side of the desk to another |
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| In a parallelogram, opposite sides are __________. |
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| In a parallelogram, opposite sides are _________. |
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| In a parallelogram, opposite angles are ________. |
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| In a parallelogram, consecutive angles are _________. |
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| In a parallelogram, a diagonal cut divides it into ________________. The diagonals ___________ eachother. |
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1. 2 congruent triangles
2. Bisect |
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| In a rectangle, there are four ______ angles. |
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| In a rectangle, diagonals are ________. |
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| A rhombus has four ______ sides. |
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| In a rhombus, diagonals are ________. |
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| In a square, there are four _______ angles. |
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| A square has four ________ sides. |
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| In a square, diagonals are _______ (1) and _________ (2). |
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(1) Congruent
(2) Parallel |
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| In a trapezoid, there is exactly one pair of _________ sides. |
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| In a trapezoid, exactly two pairs of consecutive angles are ____________. |
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| In a trapezoid, parallel sides are________; __________ sides are legs. Isosceles trapezoids have _______ legs, however. |
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| Bases; Non-parallel; congruent |
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