Question
The perimeters of 2 similar triangles ∆ABC and ∆PQR
are 18 cm and 12 cm respectively. If PQ= 8 cm, then AB is?Solution
Ratio of perimeter of similar triangles = ratio of the corresponding sides of similar triangles. (perimeter of ∆ABC)/(perimeter of ∆PQR) = AB/PQ 18/12 = AB/8 or AB = (18 × 8)/12 = 12 cm
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