Two similar triangles have areas 18 cm2 and 50 cm2. What is the ratio of corresponding sides?
Answer and explanation
Correct answer: A. 3 : 5
- Step 1: Area ratio = 18 : 50 = 9 : 25. Step 2. Linear ratio is the square root: 3 : 5. Answer: 3 : 5. Why not the others: 9 : 25: That is the ratio of the areas. 81 : 625: That squares the area ratio instead of taking its square root. 27 : 125: That cubes the sides, which is the rule for volumes.
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