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Two similar triangles have areas $50 cm^{2}$ and $18 cm^{2}$ .
The perimeter of the larger is 35 cm.
Find the perimeter of the smaller (in cm).

Class 10Areas of Similar TrianglesGeometry — Similarity

A21
B19
C23
D42

Step-by-Step Solution

Side/perimeter ratio =

\frac{50}{18} = \frac{25}{9} = \frac{5}{3}

. Smaller perimeter =

35 \times \frac{3}{5} = 21

cm.

Answer: A) 21

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