Foundation Mathematics Primary 3 Angles

Which of the following correctly describes an acute angle?

A An angle that is exactly 90 degrees
B An angle that is greater than 90 degrees but less than 180 degrees
C An angle that is less than 90 degrees
D An angle that is exactly 180 degrees
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Worked Solution

Step 1: Angles are classified by their size. Step 2: Acute angle: less than 90 degrees (sharp, like the tip of a pencil). Step 3: Right angle: exactly 90 degrees (like the corner of a square). Step 4: Obtuse angle: greater than 90 degrees but less than 180 degrees. An acute angle is less than 90 degrees.

Correct answer: An angle that is less than 90 degrees

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