Question

The actual length of c in the triangle shown is 15 cm. Use the scale drawing of the triangle to find the actual length of side a.

Answer 1

We can solve this problem by the rule of three:

1.5 cm---------------15 cm
1.2 cm---------------  x

x=(1.2 cm*15 cm) / 1.5 cm=12 cm.

answer. a=12 cm.

Answer 2

Answer: 9.375 cm

Step-by-step explanation:

From the given picture, it can be seen that the measure of side 'c' in triangle = 1.92 cm

The actual length of 'c' in the triangle = 15 cm.

The scale factor =$k=\frac{\text{ actual length of c}}{\text{length of c in figure}}$

$k=\frac{15}{1.92}=7.8125$

Now, the length of side 'a' = 1.2 cm

The actual length of side 'a' $k\times1.2=7.8125\times1.2=9.375\text{ cm}$