Two of the angles in a triangle measure 90° and 81°. What is the measure of the third angle?
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Two of the angles in a triangle measure 90° and 81°. What is the measure of the third angle?
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To find the measure of the third angle in a triangle, we can use the fact that the sum of all angles in a triangle is always 180°.
Here are the steps:
1. Add the measures of the two known angles:
( 90° + 81° = 171° )
2. Subtract this sum from 180° to find the third angle:
( 180° – 171° = 9° )
So, the measure of the third angle is 9°.
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