Question

I would like some help with this question please

Answer 1

B) 80

Explanation:

All triangles add up to 180 degrees

So to solve angle 3 the equation would be

Angle 3 = 180 - Angle 1 - Angle 2

Angle 3 = 180 - 30 - 70

Angle 3 = 80

Answer 2

The 3 angles when added together need to equal 170.

To find the 3rd angle subtract the 2 given angles from 180

180-30-70 = 80

Answer: B. 80