Use a proportion to find the missing side length in the similar figures. One triangle has the sides of 36cm and 21cm. The other has the side of 15cm.
To solve this problem, we can set up a proportion using the corresponding side lengths of the similar triangles.
Let x be the missing side length in the second triangle.
We can set up the proportion:
36cm / 21cm = x / 15cm
To solve for x, we can cross-multiply and then divide:
36cm * 15cm = 21cm * x
540cm^2 = 21cm * x
To isolate x, we divide both sides of the equation by 21cm:
540cm^2 / 21cm = x
25.71cm ≈ x
Therefore, the missing side length in the similar figures is approximately 25.71cm.