Question

is this triangle isosceles?
(there is a triangle image with angles 65°, 84°, 31° and two buttons yes no and a submit button)

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is \(180^\circ\).

Step2: Calculate the third angle

Given angles are \(65^\circ\) and \(31^\circ\). Let the third angle be \(x\). Then \(x = 180 - 65 - 31 = 84^\circ\).

Step3: Check for isosceles (two equal angles)

The angles are \(65^\circ\), \(31^\circ\), \(84^\circ\). No two angles are equal. So the triangle is not isosceles.

Answer:

no