Answer: im not very sure and im sorry but the answer is either D or C
Step-by-step explanation:
Sure I got time uh I’m not good at conversation starting but if you like anime I can talk about that for a long time but if I stop responding I’m probably doing homework
AB = sqrt(10^2 - 4^2) = sqrt(100 - 16) = sqrt(84) = sqrt(4 x 21) = 2sqrt(21) = 2 radical 21.