Using the midsegments of the triangle in the image below, what is the perimeter of АВС?
Give your answer as just a number.
Please help I’m desperate. I just don’t get it.

Moira has a canvas that is 8 inches by 10 inches. she wants to paint a line diagonally from the top left corner to the bottom right corner. approximately how long will the diagonal line be?

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?