01) Dê o valor do raio e das coordenadas do centro das circunferências cujas equações são:
a) (x – 3)2 + (y – 4)2 = 25
Resposta: r = 5 C(3, 4)
b) (x + 1)2 + (y – 2)2 = 9
Resposta: r = 3 C(-1, 2)
c) (x + 2)2 + (y + 7)2 = 6
Resposta: r = √6 C(-2, -7)
d) (x + a)2 + (y + b)2 = m4
Resposta: r = m2 C(-a, -b)
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02) Qual é o centro e o raio da circunferência (x – 3)2 + (y – 4)2 = 36?
Resposta: raio = 6 C(3, 4)
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