Brainiest to first correct!

a triangular window broke in natalia's barn. how large does the piece of glass need to be to replace the window?

OPTION A.

Step-by-step explanation:

By definition, the area of a triangle can be calculated with the following formula:

Where "A" is the area of the triangle, "b" is the base of the triangle and "h" is the height of the triangle.

In this case, you need to observe the triangular piece shown in the picture given in the exercise.

You can identify that the base and the height of the triangle are:

Therefore, you must substitute those values into the formula. Then:

Finally, you must evaluate in order to find the area of the triangle.

You get the following result:

1/2*qr*rs

step-by-step explanation: