2. ) Using the reference sheet from our online textbook which can be downloaded and is seen below, what are the x's called and what are a and b called in the formula for the Geometric Mean? * (image attached)
The x's are called unknowns, a and b are called congruent parts.
The x's are called means of the proportion, a and b are called extremes.
The x's are called similarities, a and b are called on the weekends only.

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.