On a coordinate plane, rhombus Q R S T has points (8, 20), (14, 12), (8, 4), (2, 12). How can you find the perimeter of the rhombus?
1) Find One-half(QS)(RT).
2) Find One-half(QT)(TS).
3) Use the distance formula to find QT, then multiply by 4.
4) Use the distance formula to find QT and QR, add the distances, then multiply by 4.

Explanation:
3) Use the distance formula to find QT and QR, add the distances, then multiply by 4.

(x+3)(x+7)

step-by-step explanation:

ur mom

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: 12,000

step-by-step explanation: first you ar e supposed to add. then multiply then subtract