Problema Solution
in triangle ABC, Measure of angle a is 65 degrees. and the measure of an exterior angle at C is 117 degrees. Find measure of angle B and the measure of BCA.
Answer provided by our tutors
A = 65
exterior at C is 117 this means that C = 180 - 117 = 63 degrees that is the angle BCA = 63 degrees
since A + B + C = 180 as angles in a triangle
B = 180 - (A + C)
B = 180 - (65 + 63)
B = 52 degrees
the angle B is 52 degrees.
the angle BCA is 63 degrees.