Question

The following triangle is isosceles. Find the measure of angle EFD.

Options:

28 degrees
44 degrees
20 degrees
36 degrees

Answer 1

44°

Explanation:

Because the triangle is isosceles, 4x+20 and 8x-4 would be equal

4x+20 = 8x - 4

4x + 20 - 4x = 8x - 4 - 4x

20 = 4x - 4

20 + 4 = 4x - 4 + 4

24 = 4x

x = 6

m∠EFD = 8x - 4

m∠EFD = 8(6) - 4

m∠EFD = 48 - 4

m∠EFD = 44°