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Question
Two angles of a triangle measure 39.5°
and 61.7°
. Use the Triangle Angle Sum Theorem to find the measure of the third angle; do not round the answer.(1 point)
Responses
78°
78 degrees
79°
79 degrees
68.8°
68.8 degrees
78.8°
78.8 degrees
Remaining Attempts : 3
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1 answer
To find the measure of the third angle in a triangle, you can use the Triangle Angle Sum Theorem, which states that the sum of the angles in a triangle is always 180°.
Given:
First, add the measures of the two angles: 39.5° + 61.7° = 101.2°
Next, subtract this sum from 180° to find the measure of the third angle: 180° - 101.2° = 78.8°
Therefore, the measure of the third angle is 78.8°.
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