Answer:
A. 15, 20, and 25
Step-by-step explanation:
Note that 3-4-5 is a pythagorean triple via following:

Dividing 15, 20, and 25 by 5 nets you the pythagorean triple 3-4-5.
Answer:
13
Step-by-step explanation:
The decimal approximations are:
The square root of 5 is about 2.2
The square root of 8 is about 2.8
pi is about 3.14
2 square roots of 5 are about 4.4
The numbers are also placed in order from least to greatest.
3*3+4*4=x*x and 9+16=25 so x is 5 and then add other sides so 5+8+4+5
I hope this helps you
Arc length = central angle/360.2pi.r
7/3pi=?/360.2pi.6
?=7.10
?=70