Question

Q7. If one angle of a triangle is equal to the sum of other two, show that the triangle is a right triangle.​

Answer 1

Step-by-step explanation:

let one angle be x

and other be y

so, third angle will be x+y

then from triangle law

x+y+(x+y)=180°

2x+2y=180°

=>. x+y = 180°÷2=90°

•

• • third angle= x+y =90°

hence ,the triangle is right angled triangle

if x=y then,

triangle is isoscales triangle as

x+y=90 °

2x=90°

=>. x=y=45°