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Question 1 of 3
Find the perimeter of this shape.
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The Perimeter of a shape is the sum of all the side lengths.
First, find the missing lengths. Note that since the corners are right angles, vertical lines are parallel and horizontal lines are parallel.
Subtract the 2 sides parallel to the first missing side.
Subtract the 2 sides parallel to the second missing side.
Now that we know all the side lengths, add them all to find the perimeter.
| Perimeter |
= |
5+5+12+8+7+3 |
|
= |
40 cm |
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Question 2 of 3
Find the perimeter of this shape.
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The Perimeter of a shape is the sum of all the side lengths.
First, find the missing lengths. Note that since the corners are right angles, vertical lines are parallel and horizontal lines are parallel.
The line markers indicate equal sides.
Add the 3 sides parallel to the last missing side.
Now that we know all the side lengths, add them all to find the perimeter.
| Perimeter |
= |
5+11+5+5+15+5+5+11 |
|
= |
(5+5+5+5+5)+15+(11+11) |
Add same numbers first |
|
= |
25+15+22 |
|
= |
62 m |
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Question 3 of 3
Find the perimeter of this shape.
Incorrect
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0:00
The Perimeter of a shape is the sum of all the side lengths.
First, find the missing lengths.
The line markers indicate equal sides.
Now that we know all the side lengths, add them all to find the perimeter.
| Perimeter |
= |
7+7+10+10 |
|
= |
34 cm |
