**Complete the activities on the links below:**

**Angle Sums** -- In this activity you explore the sums of the angles of polygons. Complete the Exploration activity.

**Quadrilateral in Space** -- In this activity you explore the shapes of parallelograms and rectangles. How can you change these? What remains the same?

**Diagonals to Quadrilaterals** -- In this activity you learn the relationships between quadrilaterals and the diagonals of the quadrilaterals. Complete the exploration activity.

**Properties of Parallelograms** -- In this set of activities, you use the theorems relating to parallelograms to observe that if a figure has any of these properties that figure is a parallelogram.

**Explore a Parallelogram** -- In this activity you change the shape of a parallelogram and observe how the sides and angles change.

**Explore a Rectangle** -- In this activity you change the shape of a rectangle and observe how the sides and angles change.

**Explore a Rhombus** -- In this activity you change the shape of a rhombus and observe how the sides and angles change.

**Explore as Isosceles Trapezoid** -- In this activity you change the shape of an isosceles trapezoid and observe how the sides and angles change.