ΔABC∼ΔDEF such that ar (ΔABC) = 64 cm2 and ar (ΔDEF)=169cm2. If BC = 4 cm, find EF.
Since triangle ABC is similar to triangle DEF.
Because the ratio of area of two similar triangles is equal to the ratio of square of their corresponding sides.
EF = 42.25 cm
ΔABC∼ΔDEF and their areas are respectively 64 cm2 and 121 cm2. If EF = 15.4 cm, find BC.
If ΔABC is similar to ΔDEF such that BC = 3 cm, EF = 4 cm and area of ΔABC=54 cm2. Determine the area of ΔDEF. [4 MARKS]