Chapter 8: Quadrilaterals Flashcards
Exterior Angles Formula
360/n= sum of each exterior angle in a regular quadrilateral.
Interior Angle Sum Formula
(n-2) (180)= sum of interior angles
Formula for finding the number of diagonals
n(n-3) /2
A quadrilateral is a parallelogram if both pairs of opposite sides are…
If both pairs of opposite sides in a quadrilateral are congruent, then your quadrilateral is a parallelogram.
A quadrilateral is a parallelogram if both pairs of opposite angles…
If both pairs of opposite angles in a quadrilateral are congruent, then the quadrilateral is a parallelogram
A quadrilateral is a parallelogram if one pair of opposite sides…
If one pair of opposite sides are quadrilateral are congruent and parallel, then the quadrilateral is a parallelogram
A quadrilateral is a parallelogram if the diagonals…
If the diagonals in quadrilateral bisect each other, then the quadrilateral is a parallelogram
A parallelogram is a rhombus if and only if its diagonals…
A parallelogram is a rhombus if and only if its diagonals are perpendicular.
A parallelogram is a rhombus if and only if each diagonal…
A parallelogram is a rhombus if and only if each diagonal bisects a pair of opposite angles.
A parallelogram is a rectangle if and only if its diagonals…
A parallelogram is a rectangle if and only if its diagonals are congruent.
If I trapezoid is isosceles then each pair…
If a trapezoid is isosceles, then each pair of base angles are congruent.
A trapezoid is isosceles if and only if…
A trapezoid is isosceles if and only if the diagonals are congruent.
Midsegment formula
B1+B2/2= Midsegment
If a quadrilateral is a kite, then its diagonals…
If a quadrilateral is a kite, then its diagonals are perpendicular.
If a quadrilateral is a kite, then exactly one pair…
If a quadrilateral is a kite, then exactly one pair of opposite angles are congruent.
