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Starter Questions Thursday

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Presentation on theme: "Starter Questions Thursday"— Presentation transcript:

1 Starter Questions Thursday
Q1. Find all missing angles Q2. List the prime numbers between 10 and 20. Q3. Solve 4cm Q4. Calculate the area of the shape. 5cm Wednesday, 29 May 2019 Created by Mr Lafferty 10cm

2 The Area of a circle Aim of Today’s Lesson
To come up with and be able to use the formula for calculating the area of a circle Wednesday, 29 May 2019 Created by Mr Lafferty

3 And lay them out side by side
The Area of a circle S3 If we break the circle into equal sectors And lay them out side by side We get very close to a rectangle. 1 2 3 4 5 6 7 8 5 6 7 8 2 4 3 1 Wednesday, 29 May 2019 Created by Mr Lafferty

4 The Area of a circle S3 www.mathsrevision.com 8 2 4 6 3 1 5 7
If we cut the sectors Thinner and thinner then we get closer and closer to a rectangle. Hence we can represent the area of a circle by a rectangle. 1 2 3 4 5 6 7 8 thinner and thinner sectors Wednesday, 29 May 2019 Created by Mr Lafferty

5 The Area of a circle S3 www.mathsrevision.com
But the area inside this rectangle is also the area of the circle Wednesday, 29 May 2019 Created by Mr Lafferty

6 The Area of a circle S3 www.mathsrevision.com
Q. Find the area of the circle ? Solution 4cm Wednesday, 29 May 2019 Created by Mr Lafferty

7 Begin Maths in Action Book
The Area of a circle S3 Now it’s your turn ! Begin Maths in Action Book Ex9.1 page 194 Q1-2 Wednesday, 29 May 2019 Created by Mr Lafferty

8 The Area of a circle S3 www.mathsrevision.com Find area of the circle?
The diameter of the circle is 60cm. Find area of the circle? Solution Wednesday, 29 May 2019 Created by Mr Lafferty

9 Begin Maths in Action Book
The Area of a circle S3 Now it’s your turn ! Begin Maths in Action Book Ex9.1 page 194 Q3-4 Wednesday, 29 May 2019 Created by Mr Lafferty

10 The Area of a circle S3 www.mathsrevision.com Find its radius?
The area of a circle is cm2. Find its radius? Solution Wednesday, 29 May 2019 Created by Mr Lafferty

11 Begin Maths in Action Book
The Area of a circle S3 Now it’s your turn ! Begin Maths in Action Book Ex9.1 page 194 Q5 onwards Wednesday, 29 May 2019 Created by Mr Lafferty

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