## vmathhelp Group Title Two corresponding sides of two similar triangles are 3cm and 5cm. The area of the first triangle is 12cm^2. What is the area of the second triangle? one year ago one year ago

1. vmathhelp Group Title

@ParthKohli

2. soty2013 Group Title

|dw:1359816217913:dw|

3. Naerro Group Title

Since the triangles are similar, their corresponding sides are proportional. In this case the proportion is 3:5. However, the area is calculate by multiplying 2 sides or a side and an altitude. This means the area is squarely proportional to the sides. The area of the second triangle would be $\left( \frac{ 3 }{ 5 } \right)^{2}$ multiplied by the area of the first triangle.

4. Naerro Group Title

Oops, I meant $\left( \frac{ 5 }{ 3 } \right)^{2}$