Hong Kong

Stage 4 - Stage 5

A circle centred at ($7$7, $-8$−8) has an $x$`x`-intercept at ($-10$−10, $0$0). Find the exact radius of the circle.

Easy

3min

Consider the circle with equation $\left(x-0.7\right)^2+\left(y+4.4\right)^2=3$(`x`−0.7)2+(`y`+4.4)2=3.

Easy

< 1min

Consider the circle with equation $\left(x+3.1\right)^2+\left(y-\frac{3}{2}\right)^2=\frac{9}{16}$(`x`+3.1)2+(`y`−32)2=916.

Easy

1min

Consider the circle with equation $\left(x-8\right)^2+\left(y+1\right)^2=13$(`x`−8)2+(`y`+1)2=13.

Easy

< 1min

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