Question

Suppose P, Q, and R are points in the plane such that PQ=1.8, PR=8.2, and angle PQR=90 degrees. What is the area of triangle PQR$?

Answer 1

Answer:

7.2 sq units

Step-by-step explanation:

Seeing as this is a right triangle, and the hypotenuse and one leg is given, you can use the pythagorean formula to get the third side ($\sqrt{8.2^2 - 1.8^2}$). Now that we have this leg, we can multiply this by 1.8, then divide it by two (area of triangle).