In ∆ABC, ∠A : ∠B : ∠C = 5 : 4 : 1. What is the value (in degrees) of ∠B + ∠C?

In ∆ABC, ∠A : ∠B : ∠C = 5 : 4 : 1. What is the value (in degre

1.	In ∆ABC, ∠A : ∠B : ∠C = 5 : 4 : 1. What is the value (in degrees) of ∠B + ∠C?
A.	50
B.	70
C.	90
D.	100
Answer» D. 100

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In ∆ABC, ∠A : ∠B : ∠C = 5 : 4 : 1. What is the value (in degrees) of ∠B + ∠C?

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