alleryD∈AB, E∈AC in ABC, DE∥BC; AD:DB=2:3 and BC=15 cm. DE?
A9 cm
B6 cm
C5 cm
D10 cm
Answer & Solution
Correct answer: B. 6 cm
The smaller triangle's linear scale is AD/AB=2/5, so DE=15×2/5=6 cm.
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