Question

1. classify by side and angle.

Explanation:

Step1: Classify by angle

A triangle with one angle equal to \(90^\circ\) is a right triangle. Here, we have a \(90^\circ\) angle, so by angle, it's a right triangle.

Step2: Classify by side

To classify by side, we check the lengths of the sides. The side lengths are \(7\), \(11.2\), and \(13.2\). All three side lengths are different (since \(7
eq11.2
eq13.2\)), so by side, it's a scalene triangle.

Answer:

By angle: Right triangle; By side: Scalene triangle