In the figure below D is the midpoint of segment AB, E is the midpoint of segment BC, and F is the midpoint of segment AC. Find the perimeter of triangle ABC.

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.