3) Given the isosceles triangle below, what is the measure of angle A?

Answer

66

B and C are equal, so you would add 57 and 57, which is 114, and subtract 114 by 180, which is 66.

66

Step-by-step explanation:

180 - (57 * 2)

all triangles have interior angles of 180°

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i