Area of a Triangle Teacher Resources

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.

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...

It's always nice to have a plan B. Pupils investigate an alternate formula for the area of a triangle that uses sine. A set of challenge questions shows how the new formula relates to the well-known formula of (1/2)bh.

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.

Base your calculations of the areas of triangles on their bases. An illuminating video in the Socratica Geometry playlist explains how to determine the areas of a triangle. The video uses an animation to illustrate how triangles with the...

Watch this video to discover how trigonometry can give you another way to find area of triangle. By starting with the standard formula for the area of the triangle and the right triangle trigonometric ratio for sine, the instructor...

Base times height or one half base times height ... area formulas are pretty predictable! Given the base and height dimensions of a triangle, a video lesson explains the process of finding the area. Learners have the opportunity to...

This video is the first installment in a series devoted to exploring Heron's Formula. It is a high-level experience that delves into proof using algebra. It demonstrates a step-by-step process for finding the area of a triangle using...

Addressing problems 15-16 on the practice SAT, Sal draws the diagram necessary for solving the geometry problem in number 15. After solving for the area of the triangle, he goes on to the quadratic equation in number 16, taking care to...

The formula for the area of a triangle is: area equals one half the base times the height. If you have been given these two values then all you need to do is plug them into the formula and solve. Don't forget to write the correct ending...

There's a trick to solving the area of a triangle, and it involves a skill your geometers have already mastered. Help them discover the connection between finding a rectangle's area and finding a right triangle's area as they solve for...

Determine the area of a triangle using the formula 1/2L x H. The formula is shown then demonstrated on both regular and irregular triangles. There are five practice problems included.

The teacher explains how the formula for a triangle was determined. It is related to a parallelogram. What? The formula for the area of a triangle is derived from the area of a parallelogram? Seeing is believing, so watch this video to...

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...

While the lesson focuses on right triangles, this activity offers a great way to practice the area of all triangles through an interactive webpage. The activity begins with the class taking a square paper and cutting in in half; can they...

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...

Fifth graders investigate the area of a triangle. In this geometry lesson plan, 5th graders practice finding the area of a triangle using the correct formula: 1/2bh.

This unit enables scholars to apply the rule for area of a triangle (area equals half base times height). They practice multiplication and division strategies as they calculate areas.

In this geometry worksheet, learners solve problems by finding the area of a triangle. They are given the sides and asked to solve using the Pythagorean Theorem. There are 72 problems.

The teacher explains how the formula for a triangle was determined. It is related to a parallelogram. What? The formula for the area of a triangle is derived from the area of a parallelogram? Seeing is believing, so watch this video to...

For this calculating area worksheet, middle schoolers use their problem solving skills and the information provided to find the area of 6 triangles.

Introducing the Heronês formula is the main objective of this lecture. Essentially, it describes how to solve a problem. Heron's formula is given, and then a problem is solved. Since the actual explanation of the formula will be given...

In this geometry worksheet, 10th graders find the base, height, or area of a triangle. The one page interactive worksheet contains ten questions. Answers and hints are included. 

In this area worksheet, students read and problem solve the area of 8 triangles. Students show their work on each problem on the worksheet.