Name three things you know about this triangle.

Be sure to explain HOW you know
Name lines and angles correctly.
You may use the words isosceles, symmetric, congruent, Triangle Sum Theory, or base angles to help explain your work.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.