The measure of angle D is 50⁰, the measure of angle E is 80⁰, and the measure of angle F is 10 x . What is the value of x

5

Step-by-step explanation:

50+80+10x=180

130+10x=180

10x=50

x=5

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6