This task involves demonstrating some geometric shapes and properties. Dance 1: Circle Dance A On a marked out circle: Firstly show the diameter Then show a semi-circle Finish by showing an arc Dance 2: Line Dance Do the following: Firstly show vertical lines Then show parallel lines Finish by showing horizontal lines Dance 3: Rectangle Dance On a marked rectangle: Firstly show perpendicular lines Then show the perimeter Finish by showing diagonal lines Dance 4: Circle Dance B On a marked circle: Firstly show the radius Then show the circumference Finish by showing a sector Dance 5: Angle Dance Do the following: Firstly show an obtuse angle Then show an acute angle Finish by showing a right angle Dance 6: Triangle Dance Do the following: Firstly show an equilateral triangle Then show an isosceles triangle Finish by showing a right-angled triangle