Triangle:Trapezoid:Parallelogram:Circle: C = 2πr; A = πr 2.Circular sector: A = r 2 θ.Circular arc: l = r θ.
Cylinder:Cone:Sphere: Triangle:Trapezoid:Parallelogram:Circle: C = 2πr; A = πr 2.Circular sector: A = r 2 θ.Circular arc: l = r θ.
Cylinder:Cone:Sphere: