Answer:
B = 10
Step-by-step explanation:
First we are to find the scale factor
We can do this using the ratio of the sides
From small to large
4:10
Divide each term by 2
4/2 : 10/2
2:5
The scale factor is
2/5
We want to find side B
We can use ratios
4 B
----- = ------
10 25
Using cross products
4*25 = 10*B
100 = 10B
Divide each side by 10
100/10 =10B/10
10=B
