Question

1. In the image below, triangle DBA - triangle ECA. What is the distance across the lake?

56 m
20 m
15 m
45 m

Answer 1

d = 45

Explanation:

It is stated that ECA and DBA are similar triangles.

To find the distance across the lake we can use the similarity ratio:

CE/BD = CA/BA

`(d)/(30) = (435)/(290)`

• Cross multiply fractions

290d = 13050

• Divide both sides by 290

d = 45