Landon used a semicircle, a rectangle, and a right triangle to form the figure below. Which is the best estimate of the area of the figure in square centimeters?
Let’s start with the rectangle. 6(4) = 24 cm^2. The triangle is 1/2(bh). We know the bottom of the triangle is 4 because 10-6=4. 4(4) = 16 16/2 = 8 We’re at 32 square cm so far. Now the semi circle. The diameter is 4, so the radius is 2. A = (pi)r^2 A = (pi)4 A= 4pi Best estimate could be expressed as 32 + 4pi cm^2, or substituting 3.14 for pi, 44.56 cm^2
