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To achieve a 90-degree angle, two lines or surfaces need to intersect in such a way that they form a right angle. This can be done by using tools like a protractor or a carpenter's square to measure and confirm the angle. In geometric terms, a 90-degree angle is defined as one-quarter of a full rotation, which equals 360 degrees. Thus, ensuring that each side is perpendicular to the other achieves this specific angle.

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1mo ago

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