The circle

• Wiskunde
• Middelbare school
• havo, vwo
• Leerjaar 1

Welcome to maths

Need: 

• Book open on p. 126 (you can start with reading p. 126)
• Notebook open on an empty page (with a margin)
• Pen 
• Pencil (+sharpener and eraser)
• Geo triangle
• Calculator

 Did you check your homework?

Yes? Continue reading on p. 126

No? First check and correct your homework

Write down important words and explain circumference in your own words

Goal

• To calculate the circumference and area of a circle
• Write down calculations in a short and formal way
• Check your work 

What is the difference between
the radius and diameter?

The difference between the radius
and diameter is that......is half the length of.....

Calculate the perimeter of the circle on the left.

circumference=π⋅diameter

C=2πr

area=π⋅radius​2​​

A=πr​2​​

Calculate the perimeter of the circle with a radius of 2

Calculate the area of the circle with a radius of 9

Calculate the area of the circle on the right

Work on...

• exercises 47, 48, 49 and 50 on p. 127
• Check your work after 8 minutes with a different colour
• Copy HW in your planner
• HW: Do ex. 47, 48, 49 and 50 on p. 127

Next lesson

• You have finished and checked your homework 
• HW: Do ex. 47, 48, 49 and 50 on p. 127
• We will continue to work on the properties of a circle