After a brief review, the student solves five practical shop problems using right angle trigonometry.

The learner will recognize standard-position angles and find the reference angle for any standard-position angle.

In this learning activity you'll apply the Pythagorean Theorem to isosceles and equilateral triangles.

This screencast, we see how the shape of a stain defines the angle of impact. In general terms the more circular the stain, the more perpendicular will be the angle at which it struck the surface. The more elliptical the shape of the stain, the more acute the angle will be. With practice and experience, the analyst can recognize the general angle of impact based solely on the shape of the stain.

In this learning object the student will learn how to measure a stain and calculate angles of impact. Determining the angle of impact for bloodstains takes advantage of the trigonometric functions (Sine function).

A mathematical relationship exists between the width and length of an elliptical bloodstain which allows for the calculation of the angle of the impact for the original spherical drop of blood.

Given well formed stains we can accurately measure the width and length by simply dividing the stain along it’s major and minor axis. The opposite halves would be generally equal to each other which aids in establishing the impact angle.

The conversion from rectangular to polar mode phase angle in radians is demonstrated in Excel.

In this learning activity you'll identify the sides of a right triangle with respect to the angles.

Learners study the properties of a right circular cylinder and use geometric formulas to find volume and surface area.

Learners study the properties of a right circular cone and use geometric formulas to find volume and surface area.

This video will demonstrate angle turning with a compound rest on an engine lathe.

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

Learners review the differences within the right and left parietal lobes. They answer questions based on a case study and describe a client in a second case study.

In this learning activity you'll use the Pythagorean Theorem to calculate the lengths of the legs and hypotenuse of a right triangle.

In this learning activity you'll examine how a sine bar is used to measure angles.

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.

In this learning activity you'll apply the Law of Sines in the solution on an oblique triangle when provided with two angles and the side opposite one of the angles.

In this interactive object, learners examine the characteristics of left- and right-brain thinkers.

Learners use trigonometry to calculate angular input forces involving Class 2 mechanical levers.

Learners read how to use the arctangent function to calculate the theta of an angle. The proper keystrokes are displayed.

In this animated and interactive object, the learner uses a TI-86 calculator to solve for the magnitude of the resultant and of one of the component forces in a right triangle.