Question

Se considera trapezul ABCD cu AB || CD, m (∡A) = 2m(∡D), AD = BC = 12 cm si CD = 20 cm. Aflati:

a) m(∡D);
b) AB;
c) Pabcd.

URGENT MAINE IAU NOTA PE EL !!!

Answer 1

m( <D) =180-m(<A)
m(<A) =2m(<D)=>m(<D)=180 - 2m(<D)=>180-3m(<D)=0=>3m(<D)=180=>m(<D)=180:3=60