2. What is the area of ΔPQR rounded to the nearest hundredth?

Question

ΔPQR is an isosceles triangle where PQ = PR. The length of QR is 4 units and the length of PR is 7 units.

Answer 1

Draw an altitude from point P to center of QR. Now have a right triangle and can apply Pythagorean Theorem to determine altitude, where hypotenuse if length of PQ and one leg is half of QR and other leg is the altitude.

Area will be equal to 1/2 of base (QR) * altitude.