To find the measure of angle B, we need to subtract the measures of angles A and C from 180°, since the sum of the angles in a triangle is always 180°.
m∠B = 180° - m∠A - m∠C
m∠B = 180° - 63° - 99°
m∠B = 18°
Therefore, the measure of angle B is 18°.
In △ABC , m∠A=63° and m∠C=99° . What is the measure of angle B ?(1 point)
1 answer
1 answer