postulates and theorems relating to quadrilaterals (chp. 8)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| If a convex polygon has n sides and S is the sum of the measures of its interior angles | then S=180(n-2)
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| If a polygon is convex | then the sum of the measures of th exterior angles, one at each vertex, is 360
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| Opposite sides of a parallelogram | are congruent
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| Opposite angles of a parallelogram | are congruent
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| Consecutive angles in a parallelogram | are supplementary
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| If a parallelogram has one right angle | it has four right angles
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| The diagonals of a parallelogram | bisect each other
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| The diagonal of a parallelogram seperates the parallelogram into | two congruent triangles
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| If both pairs of opposite sides of a quadrilateral are congruent | then the quaderlateral is a parallelogram
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| If both pairs oppposite angles of a quadrilateral are congruent | then the quadrilateral is a parallelogram
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| If the diagonals of a quadrilateral bisect each other | then the quadrilateral is a parallelogram
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| If one pair of opposite sides of a quadrilateral is both parallel and congruent | then the quadrilateral is a parallelogram
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| If a parallelogram is a rectangle | then the diagonals are congruent
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| If the diagonals of a parallelogram are congruent | then the parallelogram is a rectangle
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| The diagonals of a rhombus | are perpendicular
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| If the diagonals of a parallelogram are perpendicular | then the parallelogram is a rhombus
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| Each diagonal of a rhombus bisects | a pair of opposite angles
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| Both pairs of base angles of an isosceles trapeziod | are congruent
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| The diagonals of an isosceles trapeziod | are congruent
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| The median of a trapezoid is parallel to the bases, and its measure is | one-half the sum of the measures of the bases
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Created by:
m.meyer
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