Answer: FM = 5
m ∠ E = 45°
m ∠F = 45°
Step-by-step explanation:
Since this is an isosceles triangle, it is similar to the equilateral triangle you were working in a few minutes ago. By definition of an isosceles triangle, two sides and two angles are equal. To find the angle measurements , subtract 90 from 180, then divide that number by 2.
180 - 90 = 90.
90/2 = 45
