Answer:
84
Step-by-step explanation:
p^2-r^2= 10^2-(-4)^2
100-16=84
a) DE = 15
b) AB = 6
24/8 = 3
18/3 = 6
5*3 = 15
r=−3 hope i helped and please mark as brainliest! :)
4-3+1/2