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Two of the angles in a triangle measure 90° and 61°. What is the measure of the third angle?

Two of the angles in a triangle measure 90° and 61°. What is the measure of the third angle?

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Quizzma TeamMarch 22, 2025

In a triangle, the sum of all angles is always 180°. If two angles measure 90° and 61°, you can find the measure of the third angle by subtracting the sum of the known angles from 180°.

Here’s how to calculate it step-by-step:

1. Add the two known angles:

( 90° + 61° = 151° )

2. Subtract this sum from 180° to find the third angle:

( 180° – 151° = 29° )

So, the measure of the third angle is 29°.

Quizzma TeamMarch 22, 2025

In a triangle, the sum of all three angles is always 180°. If two angles measure 90° and 61°, you can find the measure of the third angle by subtracting the sum of the known angles from 180°.

1. Calculate the sum of the known angles:

( 90° + 61° = 151° )

2. Subtract this sum from 180° to find the third angle:

( 180° – 151° = 29° )

Thus, the measure of the third angle is 29°.