Question

Unknown angle problems

Answer 1

x might be 40°.

Explanation:

angle on a straight line =180°

x+100+x =180

2x =180-100

2x=80

2x/2=80/2

x=40°

Answer 2

Answer: x =40

Explanation:

x +x +100 = 180 They form a straight line so they add to 180 degrees.

2x + 100 = 180 solve for x by combining like terms

-100 -100 subtract 100 from both sides

2x = 80 Divide both sides by 2

x =40