Question

In trapezul ABCD, AB||CD , m D = 130 si m B = 45 , Aflati masurile celorlalte unghiuri ale trapezului

Answer 1

ABCD-trapez⇒∡A,∡D-suplementare⇒m(∡A)+m(∡D)=180°⇔ ⇔m(∡A)+130°=180°/-130° ⇔m(∡A)=50°
ABCD-trapez⇒∡B,∡C-suplementare⇒m(∡B)+m(∡C)=180°⇔ 45°+m(∡C)=180°/-45°⇔m(∡C)=135°