Norah is building a birdhouse. She has a 3-foot piece of wood and a 4-foot piece of wood. How many feet of wood does she have for the project?

right

step-by-step explanation:

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x