# Geometry unit 11 volume and surface area quiz 11 1

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Unit 11: Volume and Surface Area Homework 1: Area of Plane Figures- Find Area.

Asked by wiki @ in **Mathematics** viewed by 2692 People

Unit 11: Volume and Surface Area Homework 1: Area of Plane Figures- Find Area.

Answered by wiki @

**Answer:**

4. 432 cm^2/2 = **216 cm^2 **

6. **309.76 mm^2**

8. pi * 22^2 = 484pi (or, approximately 1,519.76) in^2

484/2 = **242pi or 759.88 in^2. **

10. 297.84 in^2/2 = **148.92 in^2 **

**Step-by-step explanation:**

To find the area of a triangle, you take the base and multiply by the height, and then divide by 2. Hence giving me the answers I obtained in #4 and #10.

A square is equal on all sides, so you would just square the measurement of the one side.

To find the area of a circle, you would do pi times the radius^2. Since this is a semicircle, you actually should divide the number you got by 2. (Which is why I did so up above).

I hope this helps!

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