Circumference and Area of Circles: Quiz-Quiz-Trade Cards
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Circumference and Area of Circles: Quiz-Quiz-Trade Cards
Quiz-Quiz-Trade cards for the circumference and area of circles, with 3.14 for pi, Grade 7: 32 cards to cut out and fold, a question on the front and its answer on the back, such as the circumference of a circle with a radius of 5 cm. Pair up, quiz, trade cards, find a new partner.
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Circumference of a CircleA teaching handout to hand out before this sheet: the rule, worked examples and common mistakes.Area of a CircleA teaching handout to hand out before this sheet: the rule, worked examples and common mistakes.- Pages
- 4
- Last updated
- Time
- About 15 minutes
- Printing
- Black and white
- Related curriculum
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Name the radius and diameter, find the circumference and area of a circle from either one, work back from the circumference or area, and find the area of half and quarter circles.
Reviewed by Mr. Daniel Carter, Teacher. How we check worksheets
How to use this sheet
- Have the child label the radius and the diameter on each circle before using a formula.
- Write the formula with the numbers in it on its own line before calculating.
- Estimate with π as about 3 first, and check the answer is close.
Common mistakes
- Using the diameter in the area formula. Area uses the radius: halve the diameter first.
- Squaring the wrong thing, so π × r² is worked as (π × r)².
- Mixing up circumference and area. Circumference is the distance around; area is the space inside.
