Question

In the diagram, find the length of Line BC
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Answer 1

line BC = 20/7

Explanation:

According to similar triangles rules, if 2 corresponding angles are equal, then they are similar triangles, which is the case here.

So, that means line AC corresponds with line EC, and line BC corresponds with line DC. Therefore, we can set up an equation like so:

line AC/line EC = line BC/line DC

`(4)/(7) =(x)/(5)`; where x is the measure of line BC

Use cross multiplication:
`7x=20`

`x=20/7`