Elise is measuring the angles of a triangle. She measures the first two and gets 30° and 100°. What should be the measure of the third angle?
Responses
A 130°130°
B 60°60°
C 50°50°
D 230°
The sum of the angles in a triangle is 180 degrees. To find the measure of the third angle, we can subtract the sum of the first two angles from 180:
Third angle = 180 - (30 + 100) = 50°
Therefore, the answer is C) 50°.
To find the measure of the third angle in a triangle, you need to use the fact that the sum of the angles in a triangle is always 180°.
Given that Elise measured the first two angles as 30° and 100°, you can add those two angles together: 30° + 100° = 130°.
To find the measure of the third angle, subtract the sum of the first two angles from 180°: 180° - 130° = 50°.
Therefore, the measure of the third angle is 50°.
The correct answer is C) 50°.