Question

A flashlight is projecting a triangle onto a wall

Answer 1

24

Explanation:

The the triangles are similar, the lengths of corresponding sides are in proportion.

15/20 = 18/n

3/4 = 18/n

1/4 = 6/n

n = 4 × 6

n = 24

Answer 2

n = 24

Explanation:

In similar triangles, corresponding sides are in same ratio.

`(n)/(18)=(20)/(15)\\\\\\n=(20)/(15)*18\\\\\\n = 4*6\\\\n = 24`