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\frac{\mathrm{AB}}{\mathrm{DE}}=\frac{\mathrm{BC}}{\mathrm{EF}}=\frac{\mathrm{CA}}{\mathrm{FD}}
FORMULA CHAPTER
Chapter 18 – Similarity
WBBSEClass 10Mathematics1 formulas
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Corresponding Sides of Similar Triangles
\frac{\mathrm{AB}}{\mathrm{DE}}=\frac{\mathrm{BC}}{\mathrm{EF}}=\frac{\mathrm{CA}}{\mathrm{FD}}
SymbolMeaningUnit
AB, BC, CAsides of first triangleunit
DE, EF, FDcorresponding sides of second triangleunit
Worked example
Given: AB/DE = 2 and EF = 5 cm Calculation: BC = 2×5 Answer: BC = 10 cm.