Question

Me ajudem POR FAVOR!!!

Answer 1

a)

$x^2=21^2+28^2 \implies x^2=441+784 \implies x=\sqrt{1225} =35$

b)

$25^2=x^2+24^2 \implies 625=x^2+576 \implies x=\sqrt{49} =7$

c)

$11^2=x^2+5^2 \implies 121=x^2+25 \implies x=\sqrt{96}$