Question

These figures are similar. The perimeter and area of one are given. The perimeter of the other is also given. Find its area and round to the nearest tenth. Perimeter = 20 cm Area = 18.6 cm Perimeter = 28 cm Area = [ ? ] cm

Answer 1

the area is 36.456cm^2 and rounded to the nearest tenth is 36.5cm^2

Page No. Date Schm1 Permeter of Similar polygons The ratio of the perimeters of two similar is equal to the ratio polygons of the corresponding sides - ie Perimeter of scaled polygon - the scaling factor- Scale-side Perimeter of original polygon. emginud side Thm2 Areas of similar polygans - The ratio of the area of the two similar polygons is equal to the square of the ratio of the comod spending sides Given Hood. The perimeter P = 20cm Area A = 18.6 cm2 of fiqure A The perimeter Pa = 28cm of figure B. So .. The scaling factor = 22 20 i By tho (2) AR-S2 perimeter : 20 cm Perimeter - 28 cm Az = 49x18.5 = 36.456 Cm? Area: 126m2 25 The anca As rounded to the nearest tenth is 36.5m? (Rules of Rounding. If the number you are rounding is followed by 5, 6, 7, 8, 9 then bound the number up) CE