A gardener plants 20 trees in a straight line. The trees are 5 m apart. What is the distance between the first tree and the last tree.

A Distance between 1st tree and 2nd tree is 5m

similarly it's 10m between 1st and 3rd trees and so on.

So, the total distance between the first and last tree will be :

where,

Therefore, the distance between first and last tree is 95 m.

can someone me: the midsegment through the legs of an isosceles triangle is 4 in. find the sides of the triangle if its perimeter is 20 in. ,   and point g is the centroid of the right △abc with hypotenuse ab=18 in. find cg.