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10 Cards in this Set
- Front
- Back
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what do the angles of a straight line equal?
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180 degrees
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what does an exterior angle of a triangle equal?
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the sum of the interior opposite angles
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When a pair of parallel lines are cut by a transversal the:
corresponding angles are? alternate angles are? co-interior angles? |
equal
equal supplementary |
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What is the formula for angle sum of a polygon?
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(2n-40)right angles. n is the number of sides.
eg: (2x8-4)x90=1080 (angle sum octogon) |
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What is the sum of exterior angles of any polygon?
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360 degrees
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What are the properties of a Parallelogram?
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-opposite sides are equal
-opposite angles are equal -the diagonals bisect each other |
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What are the properties of a Rhombus?
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-opposite sides are equal
-opposite angles are equal -the diagonals bisect each other at right angles -the diagonals bisect the angle through which they pass |
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What are the properties of a rectangle?
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- opposite sides are equal
-opposite angles are equal -the diagonals bisect each other -diagonals are equal |
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what are the properties of a square?
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the same as a parallelogram,rhombus and rectangle
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what is Pythagoras' Theorem?
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a squared +b squared = c squared
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