Question

10. In ∆-

,























-

10° and ∠ 4 # 5° then find the measures of each angles.​

Answer 1

<A=<B+<C

<A=5x+4x

<A=9x

by angle sum property of triangle

<A+<C+<b=180

9x +5x+4x=180

18x=180

x=10

b=5x =50

c=4x=40

a =9x=90