[tex]a. \\ p = \frac{1}{2} \times a \times h \\ p = \frac{1}{2} \times 10 \times 10 = 5 \times 10 = 50 \\ ob = a + b + c \\ {a}^{2} + {b}^{2} = {c}^{2} \\ {10}^{2} + {10}^{2} = {c}^{2} \\ {c}^{2} = 100 + 100 \\ {c}^{2} = 200 \\ c = \sqrt{200} \\ c = [/tex]
