A triangle has two angles measuring 30 degrees and 70 degrees. What is the measure of the third angle?

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Multiple Choice

A triangle has two angles measuring 30 degrees and 70 degrees. What is the measure of the third angle?

Explanation:
In any triangle, the interior angles sum to 180 degrees. The two given angles add up to 30 + 70 = 100, so the third angle must be 180 − 100 = 80 degrees. A quick check shows 30 + 70 + 80 = 180, confirming the result. The other options don’t work because they would give totals less than 180 (60 → 160), (70 → 170), or (50 → 150).

In any triangle, the interior angles sum to 180 degrees. The two given angles add up to 30 + 70 = 100, so the third angle must be 180 − 100 = 80 degrees. A quick check shows 30 + 70 + 80 = 180, confirming the result. The other options don’t work because they would give totals less than 180 (60 → 160), (70 → 170), or (50 → 150).

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