Labels:dialog box | sky | streetlight | window OCR: Shape, Space Measures Level Page The radius, r of circle the distance from the centre to the outside or half of the diameter 1 T So the circumference of any circle is TT multiplied by two lots of the radius TiiS ic nomally written as 2Tr Tre area of circle is found using the formula A = Tr2 Spaee Megsures This