Answer:
a. AB = 6
b. m<F = 70°
Step-by-step explanation:
a. Triangle ABC is an equilateral triangle because all three angles are equal to 60° each. Therefore, all three sides would also be equal to each other.
Thus, since one of the sides, BC = 6, therefore:
AB = BC = 6
b. The markings indicate that two sides of ∆EDF (ED & EF) are equal in length. This means that ∆EDF is an isosceles having two equal base angles (<F and <D).
This:
m<F = (180 - m<E)/2
m<F = (180 - 40)/2
m<F = (140)/2
m<F = 70°
