BBC

How to draw a perfect five-pointed star

STEP 2 - BISECT DIAMETER: Set your compass to the diameter of the circle. Put the compass spike at the bottom of the circle and draw an arc that touches the top of the circle and extends more than ...
BBC

How to show a cone's surface area = π × r × slant length

Click to see a step-by-step slideshow. …to create a cone, use the ruler to draw two lines outwards from the centre point of the circle - both at slight angles as above. Use the scissors to cut along ...