Question

class7 maths please any one give this answer ​

Answer 1

Answer:

x=12°

Step-by-step explanation:

<A=5x-60°, <B=2x+40°, <C=3x+80°

Angle sum property of a triangle

<A+<B+<C=180°

(5x-60°)+(2x+40°)+(3x+80°)=180°

5x-60°+2x+40°+3x+80°=180°

5x+2x+3x-60°+40°+80°=180°

10x+60°=180°

10x=180°-60°

10x=120°

x=120°/10

x=12°

<A=5x-60°=5(12)-60=60-60=0°,

<B=2x+40°=2(12)+40=24+40=64°,

<C=3x+80°=3(12)+80=36+80=116°