Question

Construct a triangle if its perimeter is 10.4cm and base angles 45°and 120°.

Answer 1

angle A = 45*
angle B = 120*
angle A+ angle B + angle C = 180*
45* + 120* + C = 180*
165* + C = 180*
C = 180 - 165
C = 15*

construct half of 90* that is 45* and 120* the point where they meet will be 15*