WEBVTT
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Ryan made this sign for his yard sale; find its area.
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We know that finding area is counting the number of square units.
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So we can count all the squares on this grid to find the area.
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But there are a few things we can do to make this a little easier.
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For example, the triangle part, here, of this figure looks like it might fit on the left end, here.
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And if that is the case, then we can treat this shape like a rectangle.
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We would need to find the area of the rectangle that I’ve highlighted in blue.
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But how can we know for sure that the triangle part fits on the end.
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If we measure the triangle on the right, it has a base of three and a height of six.
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The cutout on the left has a base of six and a height of three.
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The triangle on the right and the cutout on the left are the same size.
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Then let’s count the squares found inside this rectangle.
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There are 20 columns and there are six rows.
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If we multiply six times 20, we get 120.
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There are 120 square units in our figure.