Question

What is the measure of angle A in the triangle below? TIMED HELP

Answer 1

The sine of angle-A is 0.5
so the angle is 30 degrees.

Answer 2

Answer:

Option A is correct

30°

Step-by-step explanation:

Using sine ratio:

$\sin \theta = \frac{\text{Opposite side}}{\text{Hypotenuse side}}$

In a given triangle ACB:

BC = 9 units and AB = 18

Opposite side of angle A = BC = 9 units

Hypotenuse side = AB = 18 units.

By sine ratio:

$\sin A = \frac{9}{18}$

$\sin A = \frac{1}{2}$

$\sin A = \sin 30^{\circ}$

On comparing both sides we have;

$\angle A = 30^{\circ}$

therefore, the measure of angle A is 30 degree.