Question

Prove that the sum ofthree angles of a triangle is two right angles.​

Answer 1

Answer:

As we know that the sum of all the three angles of a triangle is 180

∘

and a right angle is 90

∘

.

Number of right angles in a triangle =

90

∘

180

∘

=2

Hence proved.

Say X= smaller acute angle in right triangle

4X= larger acute angle

90

∘

= right angle

x+4x+90

∘

=180

5x=90

∘

x=18

∘

4x=72

∘

Acute angles are 18

∘

and 72

∘