Question

How will you know if a triangle is a right-
angled triangle?​

Answer 1

Answer:

it's one angle is 90°....

That's ur answer Bub

if you are satisfied with my answer please mark it as brainliest ....

Answer 2

Answer:

By the Pythagoras theorem

Step-by-step explanation:

A right triangle is a triangle in which one of the angles is a 90∘ angle. The "square" at the vertex of the angle indicates that it is 90 degrees. A triangle can be determined to be a right triangle if the side lengths are known. If the lengths satisfy the Pythagorean Theorem (a2+b2=c2) then it is a right triangle.

I hope it's helpful