Question

If the perimeter is 20 what must be the length of the missing side length? (Answer with Number Only) *

Answer 1

The answer would be 8
Step by step
5+3= 8
8+4=12
20-12=8

Answer 2

8

Explanation:

Perimeter = Sum of all side lengths

If perimeter = 20, then 5 + 3 + 4 + x = 20

( where x = missing side length )

5 + 3 + 4 = 12

12 + x = 20

20 - 12 = 8

Hence, x = 8