Odpowiedź :
Witaj!
Oto odpowiedź:
a)
[tex]a=7,c=9\\9^{2}-7^{2}=x^{2}\\81-49=x^{2}\\x^{2}=32\\x=\sqrt{32} =4\sqrt{2}[/tex]
b)
[tex]a=9,b=40\\9^{2}+40^{2}=x^{2}\\81+800=x^{2}\\x^{2}=881\\x=\sqrt{881}[/tex]
Twierdzenie Pitagorasa
[tex]a^{2}+b^{2}=c^{2}[/tex]
Pozdrawiam~Gabriela :)
Zad.
a) b=4√2
P= 14√2
b) c=41
P= 180
Wyjaśnienie:
a)
[tex]{a}^{2} + {b}^{2} = {c}^{2} \\ {b}^{2} = {9}^{2} - {7}^{2} \\ {b}^{2} = 81 - 49 \\ {b}^{2} = 32 \\ b = \sqrt{32} \\ b = 4 \sqrt{2} [/tex]
P=a*h/2
P=4√2*7/2
P=28√2/2
P=14√2
b)
[tex] {c}^{2} = {9}^{2} + {40}^{2} \\ {c}^{2} = 81 + 1600 \\ {c}^{2} = 1681 \\ c = \sqrt{1681} \\ c = 41[/tex]
P=40*9/2
P=360/2
P=180
