Question

In ∆, ∠: ∠: ∠ = 2 ∶ 3 ∶ 5, then angle at B is (a) 54° (b) 126° (c) 136° (d) 64°​

Answer 1

Answer:

∠A:∠B:∠C:∠D=1:2:3:4

So, let ∠A=x,∠B=2x,∠C=3x,∠D=4x

Therefore, by angle sum property of quadrilateral,

x+2x+3x+4x=360

10x=360

x=36o

Hence,

∠A=36o,∠B=72o,∠C=108o,∠D=144o.

Answer 2

Step-by-step explanation:

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