Question

the pythagorean theorem can only be used on triangles.

Explanation:

The Pythagorean Theorem (\(a^2 + b^2 = c^2\), where \(c\) is the hypotenuse and \(a, b\) are the other two sides) is a fundamental principle in Geometry (a subfield of Mathematics) that applies specifically to right - angled (or right) triangles. In a right - angled triangle, one of the angles is \(90^{\circ}\), and the side opposite this right angle is the hypotenuse. The theorem relates the lengths of the three sides of such a triangle. So, the Pythagorean Theorem can only be used on right - angled (right) triangles.

Answer:

right (or right - angled)