Question

me ajuda pfv vou fica feliz​

Answer 1

Resposta:

2.

${a}^{2} = {b}^{2} + {c}^{2} \\ {5}^{2} = {4}^{2} + {x}^{2} \\ 25 = 16 + {x}^{2} \\ 25 - 16 = {x}^{2} \\ \sqrt{9} = x \\ x = 3$

o lado EF= 3cm

3. a^2=b^2+c^2

x^2=5^2+12^2

x^2=25+144

x^2=169

x=\sqrt{169}

x=13

P= 12+13+5=30