In this animated activity, learners read about the properties of a square and its components. They then work practice problems to find the perimeter and area of squares.

In this animated activity, learners read about the properties of a rectangle and its components. They then work practice problems to find the perimeter and area of rectangles.

In this animated activity, learners read the definition of a parallelogram and then find the perimeter and area of parallelograms in practice problems.

In this animated and interactive object, learners examine the definitions and formulas for radius, diameter, circumference, and area. Students also solve practice problems involving the circumference and area of a circle.