In a triangle, angle A = 30°, angle B = 90° and the side opposite A is 12 cm. What is the length of the side opposite B?
Answer and explanation
Correct answer: A. 24 cm
- Step 1: By the sine law, b / sin B = a / sin A.
- Step 2: b = 12 x sin 90° / sin 30° = 24.
Answer
24 cm.
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