Foundation Mathematics Primary 3 Angles

Which of the following describes an obtuse angle?

A An angle greater than 90° but less than 180°
B An angle equal to 90°
C An angle less than 90°
D An angle equal to 180°
Show Worked Solution

Worked Solution

Step 1: Recall the four angle types: • Acute angle: less than 90° • Right angle: exactly 90° • Obtuse angle: greater than 90° but less than 180° • Straight angle: exactly 180° Step 2: Match the definition of obtuse angle. Answer: An angle greater than 90° but less than 180°

Correct answer: An angle greater than 90° but less than 180°

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