Find the length of the median of a triangle from point C (8,6). The other 2 points form the base A(0,0) and B (5,0). The key says the answer is 9.

The length of the median will be the length of the line segment of end points:

( 8, 6 ) ( 5/2, 0)

l = √[ ( 8 - 5/2) ^2 + ( 6 -0 ) ^2]

= √[( 11/2 ) ^2 + 36] = √[( 121 + 144) /4 ] = 8. 139