## Algebra 1: Common Core (15th Edition)

a. 4$^{2}$+5$^{2}$___ 6$^{2}$ 16+25____ 36 41$\gt$36, this inequality proves that it is an acute triangle. b. 3$^{2}$+4$^{2}$___ 5$^{2}$ 9+16____ 25 25=25, this equality proves that it is a right triangle. c.10$^{2}$+15$^{2}$___ 20$^{2}$ 100+225____ 400 325$\lt$400, this inequality proves that it is an obtuse triangle.