Two similar hexagons have their perimeters in the ratio 5:7. If the smaller hexagon has an area of 75 cm², what is the area of the larger hexagon?
147 cm²
For similar figures, the ratio of areas equals the square of the ratio of perimeters, i.e., 5²:7² = 25:49. So the area of the larger hexagon = 75 × 49/25 = 147 cm².
Calculate the area of the triangle whose sides are 8 cm, 9 cm and 13 cm. (Rounded up to two decimal places)