Two triangles are similar. Sides of 4 and 10 in the first correspond to sides of 6 and x in the second. What is x?
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Correct!
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Correct answer to question 171 (Mathematics Knowledge): 15
Method
Similar triangles have proportional sides, so 4 is to 10 as 6 is to x. Cross-multiplying gives 4x = 60, so x = 15.
Updated: November 2026
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