How to find the perimeter of a triangle - SSAT Elementary Level Quantitative
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If you have an equilateral triangle and the length of one side is 
, what is the perimeter?
If you have an equilateral triangle and the length of one side is
An equilateral triangle has three equal sides. To find the perimeter of a triangle, you add up all the sides. Your final answer would then be 
.
An equilateral triangle has three equal sides. To find the perimeter of a triangle, you add up all the sides. Your final answer would then be
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Find the perimeter of an equilateral triangle with side length 1.
Find the perimeter of an equilateral triangle with side length 1.
To solve, simply use the formula for the perimeter of an equilateral triangle. Thus,
Remember, the special property of an equilateral triangle is that all of its sides are the same length so, you can either add the side length 3 times or multiply it by 3.
To solve, simply use the formula for the perimeter of an equilateral triangle. Thus,
Remember, the special property of an equilateral triangle is that all of its sides are the same length so, you can either add the side length 3 times or multiply it by 3.
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Find the perimeter of the triangle shown below:
Find the perimeter of the triangle shown below:
The perimeter is the sides added together. 
The perimeter is the sides added together.
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Use the following to answer the question.
Find the perimeter of the triangle.
Use the following to answer the question.
Find the perimeter of the triangle.
To find the perimeter of a triangle, we will use the following formula:
where a, b, and c are the lengths of the sides of the triangle.
So, in the triangle
we can see the lengths of the sides are 11cm, 12cm, and 6cm. Knowing this, we can substitute into the formula. We get
To find the perimeter of a triangle, we will use the following formula:
where a, b, and c are the lengths of the sides of the triangle.
So, in the triangle
we can see the lengths of the sides are 11cm, 12cm, and 6cm. Knowing this, we can substitute into the formula. We get
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The perimeter of a scalene triangle is 21 mm. Which choice shows the correct side lengths?
The perimeter of a scalene triangle is 21 mm. Which choice shows the correct side lengths?
When finding the perimeter of any triangle, you will need to add all three sides. In this case, it is important to note that this is the perimeter of a scalene triangle. A scalene triangle has no congruent/equal sides. The only choice that adds up to 21 mm with no equal sides is:
When finding the perimeter of any triangle, you will need to add all three sides. In this case, it is important to note that this is the perimeter of a scalene triangle. A scalene triangle has no congruent/equal sides. The only choice that adds up to 21 mm with no equal sides is:
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What is the perimeter of the above triangle?
What is the perimeter of the above triangle?
To find the perimeter of a triangle, add all of its three sides. 5 + 4 + 3 = 12
To find the perimeter of a triangle, add all of its three sides. 5 + 4 + 3 = 12
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If the blue triangle has three equal sides, what is the triangle's perimeter?
If the blue triangle has three equal sides, what is the triangle's perimeter?
Since the problem asks about an equilateral triangle (one that has three equal sides), we just need to multiply the given side's length by 3.
Since the problem asks about an equilateral triangle (one that has three equal sides), we just need to multiply the given side's length by 3.
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You can find the perimeter of a triangle if you know __________.
You can find the perimeter of a triangle if you know __________.
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What is the perimeter of the above triangle?
What is the perimeter of the above triangle?
To find the perimeter of a triangle, simply add all three sides together.
To find the perimeter of a triangle, simply add all three sides together.
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The perimeter of an equilateral triangle is 
mm. Which choice shows the correct side lengths?
The perimeter of an equilateral triangle is
When finding the perimeter of any triangle, you will need to add all three sides. In this case, it is important to note that this is the perimeter of an equilateral triangle. An equilateral triangle has 
congruent/equal sides. All the choices add up to 
mm (except the choice that shows multiplication instead of addition), but only one choice shows 
equal sides that add up to 
mm:
When finding the perimeter of any triangle, you will need to add all three sides. In this case, it is important to note that this is the perimeter of an equilateral triangle. An equilateral triangle has
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What is the perimeter of the triangle?
What is the perimeter of the triangle?
To find the perimeter of a triangle, simply add all three sides together.
To find the perimeter of a triangle, simply add all three sides together.
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Find the perimeter of an equilateral triangle whose side length is 6.
Find the perimeter of an equilateral triangle whose side length is 6.
To find perimeter of an equliateral triangle, simply multiply the side length by 3. Thus,
To find perimeter of an equliateral triangle, simply multiply the side length by 3. Thus,
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What shape has only 
angles?
What shape has only
A triangle is the only shape with 
angles.
A triangle is the only shape with
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Which shape has only 
sides?
Which shape has only
A triangle has 
sides.
A triangle has
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Find the perimeter of an equilateral triangle whose side length is 9.
Find the perimeter of an equilateral triangle whose side length is 9.
To solve, simply use the following formula for the perimeter of an equilateral triangle. Thus,
To solve, simply use the following formula for the perimeter of an equilateral triangle. Thus,
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If one side of an equilateral triangle is 6, what is the perimeter of the triangle?
If one side of an equilateral triangle is 6, what is the perimeter of the triangle?
To find the perimeter of any triangle you will need to add up all the sides. For this triangle, you will add 
since an equilateral triangle has 3 congruent sides.
To find the perimeter of any triangle you will need to add up all the sides. For this triangle, you will add
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The perimeter of an equilateral triangle is 18 cm. Which choice shows the correct side lengths of the triangle?
The perimeter of an equilateral triangle is 18 cm. Which choice shows the correct side lengths of the triangle?
When finding the perimeter of any triangle, you will need to add all three sides. In this case, it is important to note that this is the perimeter of an equilateral triangle. An equilateral triangle has three equal sides. All the choices add up to 18cm, but only one choice shows three equal sides.
When finding the perimeter of any triangle, you will need to add all three sides. In this case, it is important to note that this is the perimeter of an equilateral triangle. An equilateral triangle has three equal sides. All the choices add up to 18cm, but only one choice shows three equal sides.
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The perimeter of an isosceles triangle is 22 mm. Which choice shows the correct side lengths of the triangle?
The perimeter of an isosceles triangle is 22 mm. Which choice shows the correct side lengths of the triangle?
An isosceles triangle has two equal sides, and one different side. All of the answer choices add up to 22 mm, but only one choice shows two equal sides and one different side that add up to 22mm.
An isosceles triangle has two equal sides, and one different side. All of the answer choices add up to 22 mm, but only one choice shows two equal sides and one different side that add up to 22mm.
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An equilateral triangle has a side of length 10. What is the perimeter of the triangle?
An equilateral triangle has a side of length 10. What is the perimeter of the triangle?
In an equilateral triangle, all sides are of equal length. The perimeter of a triangle is the sum of the lengths of the three sides. Our equilateral has a side of length 10, so all sides will be equal to 10. We can find the perimeter by adding up 10 three times.
In an equilateral triangle, all sides are of equal length. The perimeter of a triangle is the sum of the lengths of the three sides. Our equilateral has a side of length 10, so all sides will be equal to 10. We can find the perimeter by adding up 10 three times.
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A triangle has a perimeter of 
inches. If all its sides are the same length, what is the length of one of its sides?
A triangle has a perimeter of
A triangle has 
sides, and its perimeter is the length of all the sides added together. Since all the sides are the same length, dividing the perimeter by 
will give the length of one side. 
divided by 
is 
inches.
A triangle has
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