Mathematics for IGCSE & O level - Similarity (Section 1 - No. 3)
A square is enlarged by increasing the length of its sides by 10%. What is the area of the enlarged square if the length of the sides was originally 8 cm?
70.4 cm²
77.44 cm²
80 cm²
80.64 cm²
Forklaring
Original side is 8cm. New side is 8 * 1.1 = 8.8cm. Area = 8.8 * 8.8 = 77.44 cm²