Shape-Related Theorems

Question 1

Rectangle angle theorem

Answer 1

If a parallelogram has one right angle, it is a rectangle

Question 2

Rectangle diagonal theorem

Answer 2

A parallelogram is a rectangle if and only if its diagonals are congruent

Question 3

Rhombus bisector theorem

Answer 3

A parallelogram is a rhombus if and only if each of its diagonals bisects two of its angles

Question 4

Rhombus diagonal theorem

Answer 4

A parallelogram is a rhombus if and only if its diagonals are perpendicular