color(white)("XXXX")A = (b*h)/2 color(white)("XXXX")color(white)("XXXX")where b is the base color(white)("XXXX")color(white)("XXXX")and h is the height (= altitude)
The area of the given triangle is color(white)("XXXX")A= (17*8)/2 = 68 (square meters)