How to do the fourth question on page 26 of the eighth grade math book?
Bc is 3cm, ab is 4cm, and af is 12cm. Using Pythagorean Theorem A? +b？ =c？ You can get 3? +4? =5? ∴ac=5 cm∶AC = 5 af = 12。 What is af? +ac？ =fc？ =13 ∴ fc =13cm: the area of a square is: side length × side length13 ×13 = 169 ∴ the area of a square cdef is/kloc-0.