Question

B
7. Prove that in a triangle if one of the angles is equal to sum of the other two angles, then it is a right-angled
triangle.
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Answer 1

Answer:The one angle of triangle is equal to the sum of the other two. / C = 90°. So, the Right - angled is proved

Step-by-step explanation:

Answer 2

Answer:

first take an angle to be x and it is giving energy that it is equal to its other two angle take them to be y and z by using angle sum property of triangle.

x +y+z=180

x+x=180 (y+z=x)

2x=180

x=180/2

x=90

hence proved