Question

mathematics rs agrawal class 7
find the angles of a triangle which are in the ratio 4:3:2​

Answer 1

Answer:

(1) In a ∆ABC, if ∠A = 72o and ∠B = 63o, find ∠C.

Solution: We know that the sum of the angles of a triangle is 180o.

∠A + ∠B + ∠C = 180o

or, 72o + 63o + ∠C = 180o

or, ∠C = 180o – 135o

or, ∠C = 45o