Please help find the missing side! (I’ll give brainlist!!)

Answer:
143
Step-by-step explanation:
from little shape to big shape its lside x 13= other bside
so the missing side is 11 x 13= 143
Answer:
X = 145
Step-by-step explanation:
91 divided by 7 = 13
91 divided by 7 = 13
52 divided by 4 = 13
We do not know what the X value is so we must multiply by 13 and we get: 143