(Each question 1 marks)

Questions

2 questions · self-marked practice — reveal the answer and mark yourself.

Question 11 Mark

Find the equation of the circle with centre (-3, 2) and radius 4

Answer

Here centre of circle is $(-3,2)$ and radius $r=4$
$h=-3, k=2$ and $r=4.0$
herefore, the equation of the required circle is $(x+3)^2+(y-2)^2=16$

Question 21 Mark

Find an equation of the circle with centre at (0,0) and radius r.

Answer

Here $(h, k)=(0,0)$ Therefore, the equation of the circle is $(x-0)^2+(y-0)^2=r^2 \Rightarrow x^2+y^2=r^2$

MATHS (Each question 1 marks)