**What Is The Area Of The Obtuse Triangle Given Below** – Videos and solutions for creating triangles to help 6th graders establish the height of three different cases and the area of a triangle to justify half of a parallelogram.

Lesson 4 Student Results • Students compose the height of three different cases: the height of one side of the right angle, the height above the base, and the height outside the triangle.

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## What Is The Area Of The Obtuse Triangle Given Below

• Students reconstruct the triangles so that the area of the triangle is half the area of the parallelogram.

### Question Video: Determining Whether A Triangle Is Obtuse Or Acute Or A Right Triangle Using Its Side Lengths

5. The Andersons go on long sailing trips in the summer. However, one of the sails on their sailboat is torn and they need to be replaced. Navigation in the image below.

If a sailboat sells for $2 per square foot, how much will a new sail cost?

6. Darnell and Donovan are trying to calculate the area of an obtuse triangle. Check out their accounts below.

Although Russell was told his work was correct, he had difficulty explaining why it was correct. Help explain why Russell’s accounts are correct.

## Obtuse Triangle Images, Stock Photos & Vectors

8. The base of the large triangle below is 10.14m long; The area of the gray triangle is 40.325 m

Let a be the area of the unshaded (white) triangle in square metres. Write and solve an equation to determine the value of A using the areas of the large triangle and the gray triangle.

Try the free Mathway calculator and problem solver below to practice different math topics. Try the given examples or write your own problem and check your answer with step by step explanation.

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#### What Is The Area Of The Obtuse Triangle Given Below?

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