Question

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

Answer 1

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