ISEE Lower Level Math : How to find the area of a triangle

Study concepts, example questions & explanations for ISEE Lower Level Math

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Example Questions

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Example Question #317 : Plane Geometry

Find the area of a triangle with a base of 7in and a height that is two times the base.

Possible Answers:

Correct answer:

Explanation:

To find the area of a triangle, we will use the following formula:

where b  is the base and h is the height of the triangle.

 

Now, we know the base of the triangle is 7in.  We also know the height is two times the base.  Therefore, the height is 14in.

Knowing this, we can substitute into the formula.  We get

Example Question #318 : Plane Geometry

Find the area of a triangle with the following measurements:

  • height:  5in
  • base:  6in
Possible Answers:

Correct answer:

Explanation:

To find the area of a triangle, we will use the following formula:

where b  is the base and h is the height of the triangle.

 

Now, we know the base of the triangle is 6in.  We also know the height of the triangle is 5in.  So, we get

Example Question #43 : How To Find The Area Of A Triangle

Use the following triangle to answer the question:

Triangle5

If the triangle has a height of , find the area.

Possible Answers:

Correct answer:

Explanation:

To find the area of a triangle, we will use the following formula:

where b is the base and h is the height of the triangle.

 

Now, given the triangle

Triangle5

we can see the base is 4ft.  We also know it has a height of 9ft.  

Knowing this, we can substitute into the formula.  We get

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