Question

If the angle of a triangle is equal to the sum of other two show that triangle is a right triangle

Answer 1

Let x be th bigger angle and
​​​​​​ y and z be other angle
Given y+z = x ---------1
Then sum of all angles of a triangle is equal to 180
x+y+z=180
x+x=180. -------from 1
2x=180
x=90°
So the bigger angles is 90°
That mean one of the angles of triangle is 90
So it is a right triangle

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