Answer:
Step-by-step explanation:
using formula
a^2+b^2=c^2
x^2+4^2=8^2
x^2+16=64
x^2=64-16
x=
cm
A. Thay intersect at one point.
Step-by-step explanation:

Answer:
approximately 10
Step-by-step explanation:
Volume = 1/3h times
times radius square
1570 = 1/3 x 15 x 22/7 x 
1570 = 5 times
times 
1570 = 15.71
= 
99.9 = r^2
= r
≅10
<span>2a^2+ab+5ab+5b^2
2a(a+b) +5b(a+b)
(a+b)(2a+5b)</span>