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ISEE Middle Level Math : ISEE Middle Level (grades 7-8) Mathematics Achievement

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Example Questions

Example Question #1841 : Isee Middle Level (Grades 7 8) Mathematics Achievement

An equilateral triangle is formed by the base of a desk. If one side of the base of the desk is 3 feet, what is the perimeter of the desk?

Possible Answers:

18ft^2

Cannot be determined from the information provided.

9ft

4.5ft^2

Correct answer:

9ft

Explanation:

An equilateral triangle is formed by the base of a desk. If one side of the base of the desk is 3 feet, what is the perimeter of the desk?

To find the perimeter of a shape, add up the lengths of its sides. In this case, we need to recall what equilateral means.

An equilateral triangle has three equal sides, therefore, this triangle will have 3 sides that are each 3 feet. So, we can find our answer as follows:

$P_{triangle}=3ft+3ft+3ft=9ft$

So our answer is 9ft

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Example Question #15 : How To Find The Perimeter Of A Triangle

Find the perimeter of an equilateral triangle with a base of length 7 inches.

Possible Answers:

$49\text{in}$

$49\text{in}^2$

$21\text{in}^2$

$21\text{in}$

$\text{There is not enough information to solve the problem.}$

Correct answer:

$21\text{in}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

So, we know the base of the triangle has a length of 7 inches. Because it is an equilateral triangle, we know that all sides are equal. Which means all sides are 7 inches. Knowing this, we can substitute into the formula. We get

$\text{perimeter of triangle} = 7\text{in} +7\text{in} +7\text{in}$

$\text{perimeter of triangle} = 21\text{cm}$

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Example Question #14 : How To Find The Perimeter Of A Triangle

Find the perimeter of an equilateral triangle with a base of 6.5cm.

Possible Answers:

$19.5\text{cm}^2$

$13\text{cm}$

$\text{There is not enough information to solve the problem.}$

$19.5\text{cm}$

$13\text{cm}^2$

Correct answer:

$19.5\text{cm}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, we know the base of the triangle is 6.5cm. Because it is an equilateral triangle, we know that all sides are equal. Therefore, all sides are 6.5cm. Knowing this, we can substitute into the formula. We get

$\text{perimeter of triangle} = 6.5\text{cm} +6.5\text{cm} +6.5\text{cm}$

$\text{perimeter of triangle} = 19.5\text{cm}$

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Example Question #15 : How To Find The Perimeter Of A Triangle

Find the perimeter of an equilateral triangle with a base of 11cm.

Possible Answers:

$121\text{cm}$

$60.5\text{cm}$

$33\text{cm}$

$32\text{cm}$

$22\text{cm}$

Correct answer:

$33\text{cm}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, we know that the base of the triangle is 11cm. Because it is an equilateral triangle, we know that all sides are equal. Therefore, all sides are 11cm.

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

$\text{perimeter of trianle} = 11\text{cm} +11\text{cm} +11\text{cm}$

$\text{perimeter of triangle} = 33\text{cm}$

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Example Question #16 : How To Find The Perimeter Of A Triangle

Find the perimeter of an equilateral triangle with a base of 9cm.

Possible Answers:

$36\text{cm}$

$18\text{cm}$

$45\text{cm}$

$12\text{cm}$

$27\text{cm}$

Correct answer:

$27\text{cm}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, we know the base of the triangle is 9cm. Because it is an equilateral triangle, all sides are equal. Therefore, all sides are 9cm.

Knowing this, we can substitute into the formula.

$\text{perimeter of triangle} = 9\text{cm} + 9\text{cm} + 9\text{cm}$

$\text{perimeter of triangle} = 27\text{cm}$

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Example Question #21 : Triangles

Use the following image to answer the question:

Triangle6

Find the perimeter of the triangle.

Possible Answers:

$18\text{ft}$

$16\text{ft}$

$72\text{ft}$

$28\text{ft}$

$36\text{ft}$

Correct answer:

$28\text{ft}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, let's look at the triangle.

Triangle6

We can see the triangle has sides with lengths of 10 feet, 6 feet, and 12 feet.

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

$\text{perimeter of triangle} = 10\text{ft} + 6\text{ft} +12\text{ft}$

$\text{perimeter of triangle} = 28\text{ft}$

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Example Question #21 : Plane Geometry

Find the perimeter of an equilateral triangle that has a base of 10 feet.

Possible Answers:

$30\text{ft}$

$50\text{ft}$

$20\text{ft}$

$100\text{ft}$

$\text{There is not enough information to solve the problem.}$

Correct answer:

$30\text{ft}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, we know the base of the triangle is 10 feet. Because it is an equilateral triangle, we know that all sides are equal. Therefore, all sides are 10 feet.

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

$\text{perimeter of triangle} = 10\text{ft} +10\text{ft} +10\text{ft}$

$\text{perimeter of triangle} = 30\text{ft}$

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Example Question #21 : How To Find The Perimeter Of A Triangle

Find the perimeter of an equilateral triangle with a base of 6ft.

Possible Answers:

$\text{There is not enough information to solve the problem.}$

$18\text{ft}$

$12\text{ft}$

$36\text{ft}$

$24\text{ft}$

Correct answer:

$18\text{ft}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, we know the base of the triangle is 6ft. Because it is an equilateral triangle, we know that all sides are equal. Therefore, all sides are 6ft.

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

$\text{perimeter of triangle} = 6\text{ft} + 6\text{ft} + 6\text{ft}$

$\text{perimeter of triangle} = 18\text{ft}$

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Example Question #22 : Triangles

Find the perimeter of an equilateral triangle with a base of length 17in.

Possible Answers:

$28\text{in}$

$47\text{in}$

$51\text{in}$

$34\text{in}$

$\text{There is not enough information to solve the problem.}$

Correct answer:

$51\text{in}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, we know the base of the triangle has a length of 17in. Because it is an equilateral triangle, all lengths are the same. Therefore, all lengths are 17in.

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

$\text{perimeter of triangle} = 17\text{in} +17\text{in} +17\text{in}$

$\text{perimeter of triangle} = 51\text{in}$

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Example Question #23 : Triangles

Find the perimeter of an equilateral triangle with a base of 14cm.

Possible Answers:

$36\text{cm}$

$42\text{cm}$

$27\text{cm}$

$18\text{cm}$

$21\text{cm}$

Correct answer:

$42\text{cm}$

Explanation:

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

$\text{perimeter of triangle} = a+b+c$

where a, b, and c are the lengths of the sides of the triangle.

Now, we know the base of the triangle is 14cm. Because it is an equilateral triangle, all sides are equal. Therefore, all sides are 14cm.

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

$\text{perimeter of triangle} = 14\text{cm} +14\text{cm} +14\text{cm}$

$\text{perimeter of triangle} = 42\text{cm}$

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All ISEE Middle Level Math Resources

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ISEE Middle Level Math : ISEE Middle Level (grades 7-8) Mathematics Achievement

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

All ISEE Middle Level Math Resources

Example Questions

Example Question #1841 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Example Question #15 : How To Find The Perimeter Of A Triangle

Example Question #14 : How To Find The Perimeter Of A Triangle

Example Question #15 : How To Find The Perimeter Of A Triangle

Example Question #16 : How To Find The Perimeter Of A Triangle

Example Question #21 : Triangles

Example Question #21 : Plane Geometry

Example Question #21 : How To Find The Perimeter Of A Triangle

Example Question #22 : Triangles

Example Question #23 : Triangles

All ISEE Middle Level Math Resources

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