In this learning activity you'll discover how perception of size is influenced by what's surrounding an image.

In this learning activity you'll explain your placement of five people somewhere withing the circle of familiars chart.

In this animated and interactive object, learners calculate the area and centroid of a circle.

The target audience of this learning object is trigonometry students who have already learned what a radian is and have already derived the key values of the coordinates associated with common radian units, but now need to practice finding those values on the unit circle. The student does not need to know the definition of the six trig functions to do this activity.

Students review how to use chordal distances to locate bolt hole circle locations. They then take a 10-question quiz to test their knowledge.

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.

In this interactive object, learners view various components of gears and read descriptions of them. Learners then identify the location of each of these components in a drag-and-drop exercise.

Students view an example of how to convert rotational velocity to linear velocity. They then work practice problems.

In this learning activity you'll discover how the visual perception concept influences your understanding of unstable figures.

Learners practice reading prints of a hub. They identify information located on the print and calculate missing dimensions.

In this module we will explore some commonly used formulas for area and volume.

In this learning activity you'll discover how visual perception is influenced by what's surrounding the image.

In this interactive object, learners are given the RPM, the pulley diameter, and the force, and proceed to calculate belt velocity and horsepower.

In this animated and interactive object, learners calculate the area and centroid of a semicircle.