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katen-ka-za [31]
3 years ago
7

Which is the measure of AB A. 10ft B. 15ft C. 20ft D. 100ft

Mathematics
1 answer:
Sladkaya [172]3 years ago
5 0

Answer:

C

Step-by-step explanation:

Since ΔABC is right use the sine ratio to find AB

sin30° = \frac{opposite}{hypotenuse} = \frac{AC}{AB}, hence

sin30° = \frac{10}{AB} ( cross- multiply )

AB × sin30° = 10 ( divide both sides by sin30° )

AB = \frac{10}{sin30} = 20 ft → C


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