Lines l, m and n are concurrent. The angle between lines l and m is 90°. If, ∠C : ∠D = 1 : 2 then what is ∠A and ∠B

Question

Step by step answer please

Answer 1

D=B

C=A

A+D= 90

B+C= 90

C/D = 1/2

cross multiply

D = 2C = B

2C+C

= 3C = 90

C=90/3

C =30 degrees

A= 30 degrees

B = 60 degrees

D = 60 degrees