Question

construct a triangle ABC in which BC is 4.7 CM angle b is 60 degree and angle c is 30 degree measurement angle a​

Answer 1

Using, Angle sum property

Sum of all angles of triangle = 180⁰

=> ANGLE( A+ B+ C) = 180⁰

=> A + 60⁰ + 30⁰ = 180⁰

=> A = 180⁰ - 90⁰

Thus measurement of angle A is 90⁰