In triangle pqr, pr = 23mm, qr = 39mm, and m< r = 163 degrees. find the area of the triangle to the nearest tenth.

131.1287 square mm (approx)

Step-by-step explanation:

The area of a triangle,

Where and are adjacent sides and is the include angle of these sides,

Here PR and QR are adjacent sides and ∠R is the included angle of these sides,

Thus, we can write,

, and ,

Thus, the area of the triangle PQR,

4444444444444 i think

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed