in ABC , m<A =63 and m<C =99. what is the measure of angle B

Answer 1

To find the measure of angle B, we need to determine the sum of the angles in triangle ABC, which is always equal to 180 degrees.

Since we know that m<A = 63 and m<C = 99, we can calculate the measure of angle B using the equation:

m<A + m<B + m<C = 180

Substituting the values we know:

63 + m<B + 99 = 180

Combine like terms:

m<B + 162 = 180

Subtract 162 from both sides:

m<B = 180 - 162

m<B = 18

Therefore, the measure of angle B is 18 degrees.