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High school geometry

Lesson 6: Theorems concerning quadrilateral properties

Prove parallelogram properties

Consider this diagram of quadrilateral A, B, C, D, which is not drawn to scale.

Which two statements must be true based on the information indicated by the diagram?

(Choice A)
start overline, A, C, end overline, \cong, start overline, B, D, end overline
(Choice B)
triangle, A, B, C, \cong, triangle, C, D, A
(Choice C)
start overline, A, B, end overline, \cong, start overline, D, C, end overline
(Choice D)
angle, A, B, D, \cong, angle, D, B, C

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