Answer:
20
Explanation:
Since the triangles are similar, all the side lengths can be multiplied by a scale factor,
12/3 = 4, so the scale factor is 4, which
5 x 4 = 20, so the missing side length is 20
Since the triangles are similar, we can use ratios to solve
12 ?
----- = -------
3 5
Using cross product
12*5 = 3?
60 = 3?
Divide each side by 3
60/3 = 3?/3
20 = ?
The unknown side is 20
5.3m questions
6.9m answers