Question

(PLEASE HELP FAST!!!) Which expression gives the area of triangle QRS?

Answer 1

The expression which gives the area of triangle QRS is $\frac{1}{2} (9)(15)sin(20^{o} )$.

We need to find the area of triangle QRS.

How do I find the area of a triangle using trigonometry?

The area of a triangle can be expressed using the lengths of two sides and the sine of the included angle. Area of Δ = ½ ab sin C.

Now, the area of the triangle QRS$=\frac{1}{2} (9)(15)sin(20^{o} )$

Therefore, the expression which gives the area of triangle QRS is $\frac{1}{2} (9)(15)sin(20^{o} )$.

To learn more about the area of a triangle using trigonometric ratios visit:

brainly.com/question/18659560.

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