Question

Pls help and show workings

Thank you in advance
Option
A. 7
B. 10
C. 13
D. 22

Answer 1

The answer is 7 it wouldn’t make sense to be higher than the numbers when the line is smaller

Answer 2

D. 22

Explanation:

Because if the missing side is 22 cm, the other two sides' sum would have to be greater than 22, but 13 + 9 = 22.