Question

If one angle of a triangle is equal to sum of the other two angles, then the triangle is
a) equilateral triangle
b) right angled triangle
c) obtuse triangle
d) isosceles triangle

Give reason as well

Answer 1

Answer:

b:right angle triangle

Answer 2

Solution :

If one angle of a triangle is equal to the sum of the other two angles, then the triangle is a right triangle.

Example: Let A, B, C are the angle of a triangle and A = 90

Now A + B + C = 180

=> 90+ B + C = 180

=> B + C = 180 - 90

=> B + C = 90

So the triangle is a right triangle.