Explore special outer and inner quadrilaterals formed by the connected midpoints and investigate the area relationships.

Explore the differences of constructed verses drawn parallelograms by dragging vertices and investigate properties.

Investigate characteristics of diagonals of various quadrilaterals.

Explore the interior angles of regular polygons by dividing the polygons into triangles.

Explore properties of some special quadrilaterals using segments to build quadrilaterals and explore their angles.

Students discover properties of the diagonals of rhombi and kites, and the properties of angles in rhombi, kites, and trapezoids.

Investigate interior angles of polygons and the sum of their measures.

This lesson involves exploring the shapes formed from 3D figures cut by a horizontal and/or a vertical plane. • Compatible TI Technologies: TI-Nspire™ CX Handhelds, TI-Nspire™ Apps for iPad®, TI-Nspire™ Software