Curated OER
How Do You Find a Missing Angle in a Right Triangle?
The triangle sum theorem states that the interior angles of a triangle add up to 180 degrees. So it seems logical that if there are two known values given for the interior angles of a triangle, the third value could be found using this...
Curated OER
How Do You Find Missing Angles in an Isosceles Triangle Using Right Triangles?
Given an isosceles triangle, and the value of one angle, find the missing values. There are some special properties about isosceles triangles. Use the triangle sum theorem to solve this problem. Watch this video to see how the instructor...
Curated OER
How Do You Find a Missing Side of a Right Triangle Using Sine?
What's a trigonometric ratio? It is a ratio between two sides of a right triangle. In this problem, find sin(A) in the given right triangle. Use the ratio of the opposite side divided by the hypotenuse to find sin(A). The instructor...
Curated OER
How Do You Find the Length of a Leg of a Right Triangle?
A right triangle. Two given measurements for two side lengths and one unknown length. Use the Pythagorean theorem to solve this problem and find the missing value. Squares and square roots are used in this problem and don't worry when...
Curated OER
Tangents and Circles - Geometry Help
Does watching a person do a math problem help you understand a mathematical concept? If it does then this clip will be a great help. The tutor in this clip completes a geometry problem involving tangents, circles, and the Pythagorean...
Curated OER
How Do You Solve a Problem Using an Angle of Elevation?
One given angle and one given length equals an unknown height. What? Here's a word problem that can be solved given two pieces of information by using the correct formula. Watch the instructor explain how to use the tangent ratio formula...
Virtual Nerd
Virtual Nerd: How Do You Determine if a Triangle Is a Right Triangle
In this video lesson a students learns how to determine if a triangle is a right triangle by using the Pythagorean Theorem.
Khan Academy
Khan Academy: Geometry: Right Triangles Inscribed in Circles (Proof)
This video tutorial [5:35] explains that if the diameter of a circle is one of the sides of a triangle inscribed in the circle then the triangle is a right triangle. This video also appears in the strand Geometry: Circles.
Khan Academy
Khan Academy: Trigonometry: Using Trig Functions Part Ii
Continuation of video lesson using the basic trigonometric functions to determine unknown side lengths of a right triangle. Example shows using trigonometry as well as the Pythagorean Theorem to find the length of the third side of the...
Khan Academy
Khan Academy: Trigonometry: Using Trig Functions
Video using the basic trigonometric functions to find the length of a side in a right triangle. Examples are given with angle measures in radians. Includes link to additional practice problems. [10:03]
Khan Academy
Khan Academy: Algebra: Pythagorean Theorem
This video tutorial [13:03] explains that the Pythagorean theorem can only be used on right triangles and explains how it is used. Gives several examples using the Pythagorean theorem to find the unknown side of a right triangle....
Khan Academy
Khan Academy: Algebra: Pythagorean Theorem 2
This video tutorial lesson [4:17] involves solving for the length of one of the legs of a right triangle using the Pythagorean theorem.
Khan Academy
Khan Academy: Algebra: Pythagorean Theorem 1
This video tutorial lesson [4:32] uses the Pythagorean theorem to find the hypotenuse of a right triangle in an application problem.
Math TV
Math tv.com: Trigonometry: Right Triangle Trigonometry
Students review right triangle trigonometry. The resource consists of a worksheet with practice problems and solutions. In the left hand menu, click Trigonometry, Right Triangle Trigonometry.
Math TV
Math tv.com: Trigonometry: Solving Right Triangles
Students learn how to use the six trigonometric definitions to solve right triangles. The learning resource consists of a video tutorial and a worksheet with practice problems. In the left hand menu, click Trigonometry, Solving Right...
Loyola University Chicago
Math Flix: Pythagorean Theorem: Introduction
This video [7:25] provides an excellent introduction to the Pythagorean Theorem. As you watch and listen to the teacher and student interact, it helps clarify the thinking behind applying this concept.
Sophia Learning
Sophia: Sine and Cosine: Lesson 7
The differences and similarities of the graphs for sine and cosine are discussed here. This lesson is 7 of 7 in the series titled "Sine and Cosine."
Sophia Learning
Sophia: The Diagonal of Rectangular Objects
In this lesson, students will learn the Diagonal of Rectangle Objects by using the Pythagorean Theorem. Students can watch a video tutorial to learn about the concept.
Virtual Nerd
Virtual Nerd: What Is the Sine Ratio?
The sine ratio is very useful when dealing with right triangles. This tutorial investigates what the sine ratio is and how to use it to find angle measurements in a right triangle. [6:49]
Virtual Nerd
Virtual Nerd: How Do You Solve a Problem Using an Angle of Elevation?
Tutorial demonstrates how to use the tangent ratio to find the height of a hill. [5:12]
Virtual Nerd
Virtual Nerd: What Are the Legs and Hypotenuse of a Right Triangle?
Features an intoduction to the names for the different parts of a right triangle. [2:13]
CK-12 Foundation
Ck 12: Elem Math: Overview of Special Triangles
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find missing angles in triangles.
CK-12 Foundation
Ck 12: Elem Math: Overview of Triangle Classifications
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to classify triangles.
Virtual Nerd
Virtual Nerd: How Do You Classify Triangles?
This tutorial provides practice in classifying triangles which is useful when figuring out how to solve for various sides and angles. [7:15]