In a triangle, angle A = 30°, angle B = 90° and the side opposite A is 6 cm. What is the length of the side opposite B?
Answer and explanation
Correct answer: D. 12 cm
- Step 1: By the sine law, b / sin B = a / sin A.
- Step 2: b = 6 x sin 90° / sin 30° = 12.
Answer
12 cm.
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