Question

6. A right triangle includes one angle that

measures 30°, What is the measure of
the third angle?
A 30°
C 60°
B 90°
D 130°

Answer 1

The measure of the third angle is 60°.

Explanation:

We are given a right triangle that has a 90 degree and two other angles that are unknown.

Since one known angle is 90° and another angle given is 30° then the third angle must be 60°. All triangles must add up to 180°.

180° - 90° - 30° = 60°.

Here is an image of the demonstration/explaining types of triangles.

Answer 2

C, 60 degrees

Explanation:

Right Triangle, with a 30 degree angle:
Given degrees:
90 (Right Triangle)
30

90+30 = 120
180-120 = 60

180 Degrees total in a triangle, you simply subtract the measure you have to fidn the third one.