SOLUTION: Rectangle abcd has an isosceles triangle bcd, what does it tell me about the rectangle?

Question 400433: Rectangle abcd has an isosceles triangle bcd, what does it tell me about the rectangle?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
BCD is isosceles and it is a right triangle (since angle BCD is contained within the rectangle, hence it is a right angle). Therefore, BC = CD, and since it is a rectangle, all four side lengths are equal and ABCD is a square.
RELATED QUESTIONS
Write a 2 column proof Given: ABCD is a Rectangle Prover: triangle ADC is congruent to (answered by richard1234)

What is the area of the right trapezoid abcd in this figure to the left if the area of... (answered by Fombitz)

CAT is an isosceles triangle whose vertex angle is (answered by KMST)
I really need help with the statement and reason of this problem. Given: Line segment... (answered by timvanswearingen)
I have to answer this question for an assignment practice but was unsure of how to do it. (answered by ikleyn)
An Isosceles Triangle Has Sides 12,12 and 20. What is the altitude of the base? What does (answered by addingup)
Rectangle ABCD has a width of (2m -3)units and a length of (4m+3) units. What is the area (answered by checkley77)
how do you prove that triangle ABE is isosceles when all your given is rectangle BCED and (answered by alexpcah)
please help me solve this question:-ABCD is a rectangle in which AB=(4x+3)cm and... (answered by Earlsdon)