IF TRIANGE M<A =63 degrees and m<C=99 degrees what is the measure of angle B

The sum of the interior angles in a triangle is always 180 degrees.

Therefore, to find the measure of angle B, we can use the formula:

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

Given that m<A = 63 degrees and m<C = 99 degrees, we can substitute these values into the equation:

180 degrees = 63 degrees + m<B + 99 degrees

Rearranging the equation:

180 degrees - 63 degrees - 99 degrees = m<B

Simplifying:

18 degrees = m<B

Therefore, the measure of angle B is 18 degrees.