First, find the area of the circle A=pi r^2 = 3.14 (8)^2=200.96 the radius is half the diameter so r=16/2=8
Second, find the area of the triangle A=(hb)/2=(8*16)/2=64 since the triangle is resting on the diameter of the circle that means the height of the triangle is also the radius of the circle so h=8 and b=16
Third, subtract the area of the triangle from the area of the circle to find the area of the shaded regions. so... 200.96-64=136.96 is the answer.
5. a.) 8.73/450x100=1.94 b.) 8.73/450≈0.02 c.) 450/8.73x25≈1289 7 a.) 622/12≈52km per hour b.) 622/0.5=1244 km per hour ( that's .......impossible...) Those are your answers.
