alleryStart learning →DE is parallel to BC. Areas of triangles ADE and ABC are 16 and 64 cm², and AB = 18 cm. Find AD.
A6 cm
B4.5 cm
C9 cm
D12 cm
Answer & Solution
Correct answer: C. 9 cm
The area ratio 1:4 gives a side ratio of 1:2, so AD = 18/2 = 9 cm.
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