Door 9: Circles (Basics)
radius (r) = half of diameter: r = d/2
Read the concepts on the whiteboard — your weapons — then walk the corridor and solve the questions to clear the door.
About Door 9: Circles (Basics)
This door covers Circles (Basics) from the Grade 7 maths syllabus. First you study the concepts and worked examples on the whiteboard, then you face a corridor of questions — answer correctly to gain energy and build a combo; a wrong answer lets a monster drain your energy. Clear every question to earn up to three stars.
Want to revise first? Read the full lesson in Circles (Basics) concepts, or jump to another door.