Tim had 47 horses on his farm. He saw
some of the horses eating hay and 28
horse running around. Which number
sentences would help you find how many
horses were eating hay?
A. _
= 47 + 28
Ⓡ42 = 28 + 19
C. __ = 28 + 47
D. 28-33
= 47

Use pythagorean’s theorem and find the missing side lengths of the two smaller triangles and add them together
13^2 - 12^2 = 5
15^2 - 12^2 = 9
5+9 = 14
14 is the length of each side of the square
14^2 + 14^2 = 19.8
19.8 is the diagonal length of the inside if the square