Area and Perimeter of Polygons
Presentation
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Mathematics
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4th - 6th Grade
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Practice Problem
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Easy
+2
Standards-aligned
Jay Tran
Used 17+ times
FREE Resource
25 Slides • 9 Questions
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Area of Polygons
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Squares can be formed from...
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Two triangles!
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Multiple Choice
What is the area of a square with sides measuring 4in?
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Since a triangle is half of a square/rectangle...
We treat it as such!
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Multiple Choice
What is the area of one TRIANGLE if the SQUARE'S area is 16in?
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But what about other shapes?
Let's explore and decompose some shapes!
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But quick. Here's a meme.
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This is a hexagon. It has six sides.
Let's decompose this hexagon!
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It's not just a hexagon...
They're six triangles!
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Poll
Can you think of another way to decompose this hexagon?
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Now we have one rectangle, and two triangles!
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Can we decompose this parallelogram?
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Poll
What shapes are you able to decompose it to?
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Great job!
Have a meme.
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Let's look at real life examples!
Here's a house.
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Here's a house on math.
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Here's a simplified house on math.
Notice that this irregular shape (called a compound shape) can be decomposed to a triangle and a square.
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In the next slide, I'll ask for the area of the triangle.
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Multiple Choice
What is the area of the triangle?
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In the next slide, I'll ask for the area of the square.
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Multiple Choice
What is the area of the square?
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The total area is 57ft.
How?
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Great job! Here's another meme.
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Follow up meme.
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Let's do another one!
Let's decompose this compound shape!
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Multiple Choice
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Yep! Let's look at this one for now.
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In the next slide, you'll be asked to find the area of the orange rectangle.
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Multiple Choice
What's the area of the orange rectangle?
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What about the green rectangle?
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Multiple Choice
What's the area of the green rectangle?
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Area of Polygons
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