Nmr 20 sklian rumus, tolong ya

Berpenyiku, jadi sudut P + Q = 90

P = 7a
Q = 8a

P + Q = 90
7a + 8a = 90
15a = 90
a = 90/15
a = 6

sudut P = 7a
= 7(6)
= 42 derajat (B)