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To find the equation of a circle when you know the radius and centre, use the formula \({(x - a)^2} + {(y - b)^2} = {r^2}\), where \((a,b)\) represents the centre of the circle, and \(r\) is the ...

The area of a circle = \(\pi {r^2}\).

Discover how many species of sea turtles there are, the biggest specimens ever discovered, what threats the turtles in our oceans face today, and much more. What is a sea turtle? Sea turtles are ...