Respuesta :

choixongdong

Answer:

D)  < B + <D = 180

Step-by-step explanation:

isosceles trapezoid

<A = <D

<B = <C

so <A + <C = 180

or < B + <D = 180

wegnerkolmp2741o

Answer:

B+D = 180

Step-by-step explanation:

An isosceles trapezoid mean the base angles are equal.  That means angles A and D are equal.  Then angles C and B are equal.  Therefore opposite angles are supplementary

A+C = 180

B+D = 180

But since A and D are equal

D+C = 180

B+ A = 180