Question Video: Finding the Perimeter of a Two-Dimensional Shape given Its Dimensions Mathematics • 3rd Grade

Find the perimeter of the shaded figure.


Video Transcript

Find the perimeter of the shaded figure.

The perimeter of a rectangle can be found by multiplying two times the length plus the width. We can label the length equals 27 centimeters and the width equals nine centimeters.

Now we’ll take the values that we just labeled and plug them into our formula: two times 27 plus nine. 27 plus nine is 36. We need to multiply 36 times two. Our perimeter equals 72.

But we can’t forget to add our units. Here our rectangle is being measured in centimeters, which means the perimeter is 72 centimeters.

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