Question

solve it step by step​

Answer 1

Step-by-step explanation:

In triangle ABC,

angle A+angle B+angle C=180°

(I will use /_ in place of angle)

180°- /_C= /_A + /_C

As /_C = 2×/_EAC

180°- 2×/_EAC = /_A + /_C

2(90- /_EAC) =/_A + /_C

As /_ADE = 90°

2(/_ADE - /_EAC) = /_A +/_C

Hence proved