Posted by sarah on .
2 people start off to work directly away from each other.they each walk for 4 kms then turn directly to their right and walk for another 3 kms.how far apart are they

math 
Reiny,
make a sketch,
the path of each will form the standard 3,4, 5 rightangled triangle, and each will have gone 5 km
(3^2 + 4^2 = 5^2)
and the line joining their endpositions will pass through their starting point
So they are 10 km apart. 
math 
sarah,
thanks,but what is 3^2,is it 3time 2 or square root of 3

math 
Ms. Sue,
3^2 = 3 squared = 9