You can use the radius measuring tool to find out the radius, circumference and area of a desired size circle. Here's how:
To use this tool in your preferred area, simply click on the “Measuring Tools” icon along the side menu.
Then, toggle on the “Toggle Radius Measuring” button.
From here, you can draw your own circle by marking a centre point and then dragging it to the desired size.
Don’t worry if you can’t get the specific size you’re after- as once the initial circle has been drawn you can type in a specific area size within the pop-out info panel.
Once the circle has been drawn, you can see all of the relevant measurements.
To re-draw or remove the circle, simply click the “Remove Radius Measurements” button within the info panel.