Question

Find the area of the triangle. Round the answer to the nearest tenth.

Answer 1

C, you use ab Sin(c)/2

Answer 2

Answer:

The correct option is C.

Step-by-step explanation:

Given information: AB=20.4, BC=17.7 and ∠ B = 99 °.

It two sides and their inclined angle is given then the area of the triangle is

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

Where, a and b are two sides of a triangle and C is their inclined angle.

The area of given triangle is

$A=\frac{1}{2}\times 20.4\times 17.7 \sin 99^{\circ}$

$A=178.317253$

$A\approx 178.3$

The area of the triangle ABC is 178.3 square units. Therefore the correct option is C.