Question

plz tell answer with full explanation ​

Answer 1

Step-by-step explanation:

answer is 7 because all the sides are equal to 21

$6 + 5 + 10 = 21 \\ 4 + 9 - + 8 = 21 \\ 10 + 3 + 8 = 21 \\ 6 + 11 + 4 = 21 \\ 11 + 7 + 3 = 21 \\ 5 + 7 + 9 = 21$

hence answer is 7