Question

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

Choose the best answer.

(1 point)

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.

You would have to know two of the angles or all three sides to test the Pythagorean theorem.

Plot the triangle on the coordinate plane and use the coordinates to see if the triangle is a right triangle.

Answer 1

You would have to know two of the angles or all three sides to test the Pythagorean theorem.

(If you know two angles you can check whether one is 90°; if you know all three side lengths you can use a^2 + b^2 = c^2.)