Answer:
18 = 90, 15 = 75 21 = 105
Explanation:
Multiply all the sides by 5 since the scale factor is 5
198
scale factor of 5
18 × 5 = 90
15 × 5 = 75
21 × 5 = 105
105 + 75 + 18 = 198
(please keep in mind that it has been a while since i last had to work on something like this and i'm not sure if its 100% correct)
hope this helped
8.5m questions
11.2m answers