How can you tell if a triangle is a right triangle with one 90 degree angle?

Question

Choose the best answer.
(1 point)

○Plot the triangle on the coordinate plane and use the coordinates to see if
the triangle is a right triangle.
○You would have to know two of the angles or all three sides to test the
Pythagorean theorem.
○Draw the triangle and use a protractor to measure the length of the sides
and angles.
○ Look and see if the triangle looks like it has two perpendicular sides

Answer 1

○Look and see if the triangle looks like it has two perpendicular sides