Grade 9 - Measurement

Calculate the circumference and area of circles using radius or diameter, exact or approximated $\pi$, and determine the perimeter and area of composite plane figures by partitioning shapes, inferring missing lengths, and distinguishing boundaries from regions. Calculate the surface area and volume of prisms and right circular cylinders, using nets and formulas, appropriate linear, square, or cubic units, and distinguish exposed surfaces from shared or internal boundaries when solving problems involving composite solids. Convert decimal measurements among common metric units of length, area, and volume, including millimetres, centimetres, metres, kilometres, and litres, applying squared conversion factors for area, cubed factors for volume, and $1\text{ L}=1\text{ dm}^3$.