AM-763

Equation of a circle (centre–radius form)

A Math · Secondary 3 · Medium · Equation of a circle (centre–radius form)

A circle has equation

(x-1)^2+(y+2)^2=25

. Find its centre and radius.

Centre $(1,-2)$ , radius $5$
Centre $(-1,2)$ , radius $5$
Centre $(1,2)$ , radius $25$
Centre $(-1,-2)$ , radius $\sqrt{25}$

Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.

Loading problem…