Question

I will give a fan and medal for help!!!
An isosceles trapezoid is a quadrilateral with two congruent legs, a pair of parallel bases, and congruent base angles. Prove the diagonals of an isosceles trapezoid are congruent. Be sure to create and name the appropriate geometric figures.

Answer 1

hint: try to prove triangle ABD= triangle DCA

Answer 2

so what is the first step to that?

Answer 3

why dont you tell me? how would you start it?

Answer 4

I think i would start out with seeing what segments are parallel to each i think?

Answer 5

oh wait I am stuip we already know that CD and BA are parallel

Answer 6

So I think that I would start with finding the verticle angles

Answer 7

no need.
hint: it involves SAS using whats given and AD=AD by reflexive

Answer 8

Ok I know what SAS is but I dont get why it involves the reflexive

Answer 9

you need another pair of congrunet sides before you can use SAS.
you are only given a pair of sides and a pair of angles.

Answer 10

could we use angle CDB? that would be SAS

Answer 11

what would you do with CDB?