Areas part 2
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Lesson Summary:
In this areas lesson, the formula for the area of a circle is reviewed as well as the areas of various composite shapes. The formula for the area of a circle is pi multiplied by the square of the radius of the circle. Additionally, the lesson covers finding the areas of parts of circles by dividing the appropriate fraction, and calculating the floor area of composite shapes made up of circles and squares. The lesson includes several examples for practice and comes with hints and answers.
Lesson Description:
Area and circumference of circle and areas of composite shapes involving parts of circles
Questions answered by this video:
- What is the formula for the area of a circle?
- How do you find the area of a circle?
- If a circle has a radius of 6cm, what is the area of the circle?
- How do you find the area of half or a quarter of a circle?
- How would you find the area of a composite shape?
- How do you find the area of a shape made from 4 semicircles of diameter 8m and a square of side 8m?
- How do you find the area of a rectangle plus a semi-circle in which the rectangle is 5m by 10m?
- How do you find the area of a square minus two semi-circles in which the side of the square is 5cm?
- How do you find the area of a square minus a quarter circle in which the side of the square is 4cm?
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Staff Review
This lesson shows the formula for the area of a circle and explains how to calculate the area of several different circles. Some areas of composite shapes are also shown. This introduction to finding areas is great as an introduction or a review. -
