Mathematics for IGCSE & O level - Similarity (Section 2 - No. 21)
A tray has an area of 160 cm². What is the area of a similar tray if the lengths are halved?
40 cm²
80 cm²
320 cm²
640 cm²
Explicació
If the length scale factor is 0.5, the area scale factor is 0.5^2 = 0.25. Thus, Area = 160 * 0.25 = 40 cm²