FuseSchool
Area of a Triangle 1/2absinC
Can you find the area of a triangle without knowing the height? Applying trigonometry makes quick work of this type of problem. The video instructor presents problems for scholars to consider and then provides a worked out solution. She...
FuseSchool
Area of a Triangle 1/2absinC Proof
Demonstrate the derivation of the trigonometric area formula for a triangle. Using the base/height formula and the sine ratio, the lesson instructor demonstrates how to combine the two and create the formula A = 1/2absinC. The video...
Math Antics
Area
Area is a two-dimensional measurement for a two-dimensional figure. The introduction of area expands on the idea of the one-dimensional measurement of length, but instead of staying one-dimensional, it goes in two directions. The video...
Mathed Up!
Area of Compound Shapes
Scholars learn how to determine the area of compound shapes by finding the areas of the basic shapes that make it up. Pupils find the areas by adding areas together or subtracting them.
Krista King Math
Area of a Triangle
Triangles are not all created the same. The instructor shows how to find the area of different types of triangles using the formula. She also includes an example requiring coordinate geometry.
TED-Ed
Why Are Manhole Covers Round?
Discover the peculiar geometric property of the curve of constant width, the Reuleaux triangle, and their intriguing connection to manhole covers with yet another fascinating TED-Ed video.
Curated OER
How Do You Find the Volume of a Triangular Pyramid?
Instruct your class on how to find the volume of a triangular pyramid using this tutorial. Learners can watch the video and take notes, later applying what they have seen to class work or homework. A clear video with direct instruction,...
Curated OER
Area of a Triangle - Geometry Help
Do you know what A=1/2 bh means? If you don't this video on the area of a triangle is a must. It defines the formula needed to determine the area of a triangle, works through an example problem, and clearly explains the procedure.
Curated OER
Area of a Triangle Using Trigonometry
Step-by-step, viewers are taught how to use one angle to find the area of a triangle. This video is useful for your trigonometry learners, especially if you employ a flipped classroom model. Mathematicians can view this at home and them...
Curated OER
How Do You Find the Volume of a Triangular Pyramid?
Instruct your class on how to find the volume of a triangular pyramid using this tutorial. Learners can watch the video and take notes, later applying what they have seen to class work or homework. A clear video with direct instruction,...
Curated OER
How do You Find the Area of a Triangle?
Help your class visualize how to find the area of a triangle. In a step-by-step process, the instructor shows how to calculate the area of a triangle. Great for instruction and/or review.
Corbett Maths
Area of a Triangle – Sine/Trigonometry
Half the base times height was great for elementary school, but now we have a more general formula. Scholars watch a short video that highlights the area formula A = 1/2 ab sin C. The narrator works through an example of applying the...
Khan Academy
Khan Academy: Geometry: Finding Area Using Similarity and Congruence
Explains how to determine the area of a pentagonal shaded region in a triangle. The triangle that is broken into multiple similar and congruent triangles. [10:07]
Khan Academy
Khan Academy: Worked Examples: Geometry: Pythagorean Theorem, Area
Students watch a video tutorial to learn how to solve area problems of composite figures using the Pythagorean Theorem.
Khan Academy
Khan Academy: Triangles: Area of Koch Snowflake (Part 2) Advanced
In this video students explore summing an infinite geometric series to finally find the finite area of a Koch Snowflake.
Khan Academy
Khan Academy: Triangles: Area of Diagonal Triangles of Rectangle Are Equal
This video shows that the area of diagonal generated triangles of a rectangle are equal.
Sophia Learning
Sophia: Calculating the Area of a Triangle
Use different size triangle to determine how to solve for the area in this video lesson. Take quiz to check understanding. [3:41]
Khan Academy
Khan Academy: Triangles: Area of an Equilateral Triangle
This video tutorial explores finding the formula for the area of an equilateral triangle with side length of s.
Khan Academy
Khan Academy: Triangles: Area of Inscribed Equilateral Triangle
Students explore a problem that requires then to figure out the area of an equilateral triangle inscribed in a circle using a little trigonometry.
Loyola University Chicago
Math Flix: Formula Area of a Triangle
This QuickTime movie explains how to find the area of a triangle by developing an area formula and then demonstrates this by showing how to use the area formula. As you watch and listen to the teacher and student interact it helps...