Perimeter of a Triangle Practice
Question 1
Find the perimeter of a triangle that has the side lengths of 2cm,
6cm and 9cm.
Answer
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Step by Step Solution
Step 1
The picture below shows the triangle:
Step 2
We start with the formula for the perimeter of a triangle, P,
as shown below.
as shown below.
Step 3
Now, this formula simply means that we can find its perimeter by adding up all the side lengths together. Hence, we have:
Step 4
It is important to include the unit. Since, the sides lengths are given in cm, P will be in cm:
P = 17cm
Step 5
Therefore, the answer is A.
To close the steps,
perimeter of a triangle practice page
