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12 votes
12 votes
Find the area of the shape use decomposition

User Dompie
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1 Answer

17 votes
17 votes

We can divide the figure into two triangles.

As you can observe, both triangles are equal, their base is 3 units long and their height is 5 units long. The height is outside the triangle because it's an obtuse triangle. First, let's use the area formula for triangles.


A=(bh)/(2)

Where b = 3 and h = 5. Let's find the area of one triangle.


A=(3\cdot5)/(2)=(15)/(2)

Then, we multiply this area by 2 because there are two triangles.


A_{\text{total}}=2\cdot(15)/(2)=15

Therefore, the area of the shape is 15 square units.

Find the area of the shape use decomposition-example-1
User Wenxi Zeng
by
3.1k points