# Area of a Triangle Teacher Resources

Find Area of a Triangle lesson plans and worksheets

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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.

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...

CK-12 Foundation

#### Alternate Formula for the Area of a Triangle: Alternate Area of a Triangle

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.

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.

Socratica

#### Area of a Triangle

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...

Curated OER

#### What is the Formula for the Area of a Triangle Using Sines?

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...

Corbett Maths

#### Area of a Triangle

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...

Curated OER

#### Part 1 of Proof of Heron's Formula

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

Khan Academy

#### SAT Prep: Test 2 Section 6 Part 5

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...

Curated OER

#### How Do You Find the Area of a Triangle?

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...

Curated OER

#### Area of Right-Angled Triangles

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...

Curated OER

#### Area of a Triangle: Formula

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.

Curated OER

#### What is the Formula for the Area of a Triangle?

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...

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...

Shodor Education Foundation

#### Triangle Area

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...

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...

Curated OER

#### Finding the Area of a Triangle

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

Curated OER

#### Triangles

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.

Curated OER

#### Area of a Triangle

In this geometry worksheet, students 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.

Curated OER

#### What is the Formula for the Area of a Triangle?

Curated OER

#### Perimeter and Area 5

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

Khan Academy

#### Heron's Formula

Introducing 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 during...

Curated OER

#### Triangle Problems-Base, Height, and Area

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.

Curated OER

#### Area of Triangle

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

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