Question

two angles of a triangle add up to 65°. what is the measure of the third angle?
55°
25°
295°
115°

2 multiple choice 4 points
what is the measure of angle r?

92° 59°

17°
39°
29°
31°

Explanation:

Step1: Recall triangle angle sum

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

Step2: Calculate first triangle's third angle

Subtract the sum of two angles from $180^\circ$:
$180^\circ - 65^\circ = 115^\circ$

Step3: Calculate second triangle's angle R

Subtract the two given angles from $180^\circ$:
$180^\circ - 92^\circ - 59^\circ = 29^\circ$

Answer:

1. D. 115°
2. C. 29°