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No. For example, say the two angles are 10° and 20°. Then the other angle is 180°-10°-20°=150° and that is not a right angle.

But if the triangle has two equal acute angles of 45 degrees then the 3rd angle must be 90 degrees which will form a right angle triangle.

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No, it does not.

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8y ago
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Q: Must a triangle with two acute angles be a right angle?
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