Question

A triangle has sides 3, 4, 5 units. __________ are the sides of a triangle similar to it.

• A. 9, 16, 25
• B. 15, 20, 25
• C. 12, 15, 18
• D. 18, 24, 28

Answer 1

The correct option is B 15, 20, 25

Similar triangles have the same corresponding angle measures and proportional side lengths.
The given triangle has sides 3, 4, 5 units.
Triangle similar to the given triangle should have proportional side lengths.
Only option b have proportional sides length.

$\frac{3}{15}$ = $\frac{4}{20}$ = $\frac{5}{25}$ = $\frac{1}{5}$