Question

find the value of B and C if a = 40 degree from the adjoining figure .​

Answer 1

Answer:

$a = an.pqs \: \\ b = > 180 - 2 \times 40 = 100 \\ an.qsr = 180 - 100 = 80 \\ let \: qs = sr \\ 2c = 180 - 80 = 100 = > c = 50$

Answer 2

In triangle PQS

as PS = QS

so angle QPS = angle PQS

then, angle ( PQS + QPS + PSQ ) = 180 [ANGLE SUM PROPERTY]

so 40 +40 + PSQ = 180

80 + PSQ = 180

PSQ = 180-80

PSQ = 100

THEREFORE, angle b = 100