Question

if one angle is equal to other two angle's sum in a triangle.....show that triangle is a right angled triangle

Answer 1

Let one angle be A other is B
Let angle Y=A+B
We know that in a triangle sum of all the angles is equal to 180 degree
Then A+B+Y=180
2Y= 180
Y= 90
Since one of the angle of a triangle equals to 90 degree so triangle is right angled triangle.

Answer 2

Answer:

Step-by-step explanation:

Let one angle be A other is B

Let angle Y=A+B

We know that in a triangle sum of all the angles is equal to 180 degree

Then A+B+Y=180

2Y= 180

Y= 90

Since one of the angle of a triangle equals to 90 degree so triangle is right angled triangle.