David drew the polygon below. The perimeter of the polygon is 76 inches. What is the missing side length? Polygon with side lengths as 7 inches, 15 inches, 7 inches, 12 inches, 17 inches and ? Inches. Enter your answer in the box. inches

answer: 43/157

this is the answer and if you try to prove me wrong your a meanie

b mark me branliest thx

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

answer: #1 ads up by 8 and i don't know #2