Let ABC be any triangle. Designate by A', B' and C' the respective midpoints of [BC] , [CA] and [AB] 1° Show that AA' + BB'+CC' = 7.
2° Deduce that, if G is the centroid of triangle ABC, then G is also the centroid of triangle
A'B'C'.

The sum of two numbers is 86, and their difference is 20. find the two numbers

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)