3 years ago

In △ABC, m∠B = 90°, m∠C = 15°, M ∈ BC. If m∠BAM = 60°, AM = 10 in. Find: AB URGENT

1 answer:

7 0

Answer:

Step-by-step explanation:

You end up with a 30°-60°-90° triangle inside of △ABC.

The sides of a 30°-60°-90° triangle are always in the ratio 1:√3:2.

AB is opposite the 30° angle. AM is opposite the 90° angle and has length 10, so AB is half the length of AM.

AB = 5 units.

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