// Numbas version: finer_feedback_settings {"name": "2.6.5 Circle radius and centre no 2", "extensions": [], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "2.6.5 Circle radius and centre no 2", "tags": [], "metadata": {"description": "
Determine the radius and centre coordinates of a circle with equation expressed in expanded form.
", "licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International"}, "statement": "Write down the radius and the coordinates of the centre of the following circle
\n$\\var{equation}$
", "advice": "We need to begin by completing the square on the $x-$terms and on the $y-$ terms:
\n$\\var{equation}$
\n$\\var{completedsquares} = 0$
\n$\\var{simplifiedequation}$
So the circle has radius = $\\var{radius}$ and centre $C = (\\var{centrex},\\var{centrey})$
Centre = ( [[0]],[[1]] )
\nRadius = [[2]]
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