Will give brainilest Pls help thanks so much! Write a two column proof that if the diagonals of a parallelogram are congruent, that parallelogram must be a rectangle.

Given: ABCD is a parallelogram with AB parallel to CD and AD parallel to BC. Diagonal AC is congruent to diagonal BD.

Prove: ABCD is a rectangle (angles A, B, C, and D are right angles).

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

step-by-step explanation:

at each of the parallel lines adjacent angles are supplementary. the angles have special names identifying their positions with respect to the parallel lines and transversal. they are corresponding angles, alternate interior angles, or alternate exterior angles. an angles is congruent to its matched angle.

it will take 9 minutes