What phrase describes a right angle (makes a square corner)?

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Multiple Choice

What phrase describes a right angle (makes a square corner)?

Explanation:
A right angle is a corner that looks like a square corner and measures 90 degrees. The phrase "a 90 degree angle" name-lights both what kind of angle it is (a right angle) and its exact size (90 degrees), making it the best description. The word "degree" alone is just a unit of measurement and doesn’t identify the angle. A "ray" is a half-line with a starting point, not a measure of the angle. A "vertex" is the point where two lines meet to form the angle, not the size of the angle itself.

A right angle is a corner that looks like a square corner and measures 90 degrees. The phrase "a 90 degree angle" name-lights both what kind of angle it is (a right angle) and its exact size (90 degrees), making it the best description. The word "degree" alone is just a unit of measurement and doesn’t identify the angle. A "ray" is a half-line with a starting point, not a measure of the angle. A "vertex" is the point where two lines meet to form the angle, not the size of the angle itself.

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