Parallelograms Answers

What are the remaining angle measures if the figure is to be a parallelogram? m∠B = ° m∠C = ° m∠D = °

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Use parallelogram ABCD. What are the values of x and y? x = y =

What is the length of segment EB in parallelogram ABCD?

Which concept is used to prove that the opposite sides of a parallelogram are congruent?

What is the value of r? What is the length of segment EF? units

What is the measure of ∠A? ° What is the measure of ∠B? °

By the definition of a parallelogram, AB∥DC. AD is a transversal between these sides, so ∠A and ∠D are angles. Because AB and DC are , the same-side interior angles must be by the same-side interior angles theorem. Therefore, ∠A and ∠D are supplementary.