Question

1. a) isosceles b) scalene c) equilateral

Explanation:

Step1: Recall triangle - type definitions

An isosceles triangle has two sides of equal length. A scalene triangle has all sides of different lengths. An equilateral triangle has all sides of equal length.

Step2: Analyze side - lengths of the given triangle

The side - lengths of the given triangle are 3.2, 3.2, and 4.5. Since two sides have a length of 3.2, it has two equal - length sides.

Answer:

A. isosceles