The perimeters of two similar triangles are 81 cm and 63 cm respectively. If one side of the first triangle be 18 cm, then find the corresponding side of the smaller triangle.

14 cm

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18 cm

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13 cm

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15 cm

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Solution

The correct option is A 14 cm
Since we know that the ratio of perimeters of two similar triangles is the ratio of two of its corresponding sides, thus,
$\frac{81}{63} = \frac{18}{x}$
$x = unknown side = 14 c m .$

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The perimeters of two similar triangles are 81 cm and 63 cm respectively. If one side of the first triangle be 18 cm, then find the corresponding side of the smaller triangle.

The correct option is A 14 cmSince we know that the ratio of perimeters of two similar triangles is the ratio of two of its corresponding sides, thus,8163=18xx=unknown side=14cm.

The correct option is A 14 cm
Since we know that the ratio of perimeters of two similar triangles is the ratio of two of its corresponding sides, thus,
$\frac{81}{63} = \frac{18}{x}$
$x = unknown side = 14 c m .$