Question

Solve for r in the diagram below.
(x + 12)
100°

Answer 1

Answer: x=34

Explanation:

Answer 2

x = 34

Explanation:

The sum of the three angles is 180 since they make a straight line

x+12 + 100 +x = 180

Combine like terms

2x+112=180

Subtract 112 from each side

2x+112-112= 180-112

2x = 68

Divide by 2

2x/2 =68/2

x = 34