Question

The Sum of The Angles in a Triangle

Answer 1

Answer:

A=20

Step-by-step explanation:

180-110=70

90+70=160

180-160=20

Answer 2

Answer:

20°

Step-by-step explanation:

We know that the exterior angle of a triangle is equal to the sum of interior opposite angles.

<B + <A = <C

90° + <A = 110°

<A = 110° - 90°

<A = 20°