Question

1. two angles of an isosceles triangle measure 40 degrees. what is the measure of the third angle? 60 degrees 80 degrees 120 degrees 100 degrees

Explanation:

Step1: Recall triangle angle sum

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

Step2: Calculate sum of given angles

Two angles are \(40^\circ\) each, so their sum is \(40^\circ + 40^\circ = 80^\circ\).

Step3: Find the third angle

Subtract the sum of the two angles from \(180^\circ\): \(180^\circ - 80^\circ = 100^\circ\).

Answer:

100 degrees (the option with "100 degrees")