julia needs to purchase a ladder that just reaches the top of a 16 foot building. if the bottom of the ladder will be placed 12 feet from the base of the building how long should julia's ladder be?

Answer 1

20 feet. Consider the Pythagorean theorem and right triangles with 3:4:5 side length ratios

Answer 2

you do a2(squared) plus b2(squared) equals c2(squared)
a squared plus b squared equals c squared.