Nice construction work from Ashley at Downham Market High School.

First we need the area of the whole circle using the formula pr² to produce 300 cm²

Then if pr² is 300

r² is 95.49296586

So r is the square root of 95.49296586

and has to be 9.8 cm to the nearest mm

Now draw the circle.

Keeping the radius fixed, move the point of the compasses to the circumference and mark off one radius length around the circumference.

Move the point of the compasses on to that mark and repeat until you have six marks equally spaced around the circle.

Next join three of the marks to the centre to make thirds

Measure half way along these lines to get the centre for the semi-circles that make the tear shapes.

Finally rub out the working and add some colour.

Well done Ashley. Maybe someone can see how to find those mid-points by construction rather than measuring.