Unit 10 Quadrilaterals
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11 Terms
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Sum of Interior angles
(n-2)180
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One interior angle of a regular polygon
[(n-2)180]/2
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Sum of exterior angles
always 360
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Measure of one Exterior angle (Regular polygon)
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# of sides of a regular polygon
360/# of exterior angle
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Characteristics of Parallelograms
- Opposite sides parallel
-Opposite angles congruent
-Opposite sides congruent
-Consecutive angles=180
-Diagonals bisect
-Opposite angles congruent
-Opposite sides congruent
-Consecutive angles=180
-Diagonals bisect
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Rectangles
-All properties of parallelograms
-4 right
-4 right
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Rhombi
-All properties of parallelograms
-4 equal right triangles
-Diagonals bisect angles
-Diagonals perpendicular
-Diagonals divide into 4 congruent triangles
-4 equal right triangles
-Diagonals bisect angles
-Diagonals perpendicular
-Diagonals divide into 4 congruent triangles
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Squares
All properties of parallelograms
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Trapezoids (Non-Isosceles)
-One pair of parallel sides
-Consecutive angles supplementary
-Consecutive angles supplementary
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Isosceles Trapezoids
-Same as Non-Isosceles PLUS
-Non-parallel sides congruent
-Diagonals congruent
-Base angles congruent
-Non-parallel sides congruent
-Diagonals congruent
-Base angles congruent
Note 
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