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2.1 & 2.2 Calculate the circumference and area of a circle

Can we choose our emotions or do they just happen?
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Slide 1: Woordweb
MathematicsLower Secondary (Key Stage 3)

In deze les zitten 38 slides, met interactieve quizzen, tekstslides en 2 videos.

time-iconLesduur is: 60 min

Onderdelen in deze les

Can we choose our emotions or do they just happen?

Slide 1 - Woordweb

Deze slide heeft geen instructies

2.1 Calculate the circumference and area of a circle

Slide 2 - Tekstslide

Deze slide heeft geen instructies

timer
1:30
What are the properties of a circle?

Slide 3 - Woordweb

Deze slide heeft geen instructies

Circle
The parts of a circle are the radius, diameter, circumference, arc, chord, secant, tangent, sector and segment. A round plane figure whose boundary consists of points equidistant from a fixed point.

Slide 4 - Tekstslide

Deze slide heeft geen instructies

timer
1:30
What is the radius of a circle?

Slide 5 - Woordweb

Deze slide heeft geen instructies

Radius
Radius is always half the length of its diameter. For example, if the diameter is 4 cm, the radius equals 4 cm ÷ 2 = 2 cm.

Slide 6 - Tekstslide

Deze slide heeft geen instructies

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1:30
What do we mean when talking about the circumference of a circle?

Slide 7 - Woordweb

Deze slide heeft geen instructies

Circumference
Circumference of the circle or perimeter of the circle is the measurement of the boundary of the circle.

Slide 8 - Tekstslide

Deze slide heeft geen instructies

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How do we find the circumference of a circle?

Slide 9 - Woordweb

Deze slide heeft geen instructies

Slide 10 - Video

Deze slide heeft geen instructies

Khan & Miro Board Activities
https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-area-circumference/e/radius_diameter_and_circumference
timer
12:00

Slide 11 - Tekstslide

Deze slide heeft geen instructies

Is it essential to be a “good person”? Why?

Slide 12 - Woordweb

Deze slide heeft geen instructies

Last time...

Slide 13 - Tekstslide

Deze slide heeft geen instructies

Hard question!
What is a 'segment' of a circle?
timer
0:30
A
a straight line that connects two points on the circumference of a circle
B
a straight line that touches the circumference of a circle at only one point
C
the area enclosed by an arc of a circle and a chord
D
a line that intersects a circle at two distinct points

Slide 14 - Quizvraag

Deze slide heeft geen instructies

Slide 15 - Tekstslide

Deze slide heeft geen instructies

Hard question!
What is a 'tangent' of a circle?
timer
0:30
A
the area enclosed by an arc of a circle and a chord
B
a straight line that connects two points on the circumference of a circle.
C
a line that intersects a circle at two distinct points
D
a straight line that touches the circumference of a circle at only one point

Slide 16 - Quizvraag

Deze slide heeft geen instructies

Slide 17 - Tekstslide

Deze slide heeft geen instructies

Write down 3 things you learned in this lesson.

Slide 18 - Open vraag

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.
Write down 2 things you want to know more about.

Slide 19 - Open vraag

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.
Ask 1 question about something you haven't quite understood yet.

Slide 20 - Open vraag

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.
Khan & Miro Board Activities
https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-area-circumference/e/radius_diameter_and_circumference
timer
12:00

Slide 21 - Tekstslide

Deze slide heeft geen instructies

2.2 Calculate the area of a circle

Slide 22 - Tekstslide

Deze slide heeft geen instructies

timer
1:30
What do we mean by 'area' of a circle?

Slide 23 - Woordweb

Deze slide heeft geen instructies

timer
1:30
How do we find the area of a circle?

Slide 24 - Woordweb

Deze slide heeft geen instructies

Slide 25 - Video

Deze slide heeft geen instructies

Area

Slide 26 - Tekstslide

Deze slide heeft geen instructies

Khan & Miro Board Activities
https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-area-circumference/e/area_of_a_circle








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15:00

Slide 27 - Tekstslide

Deze slide heeft geen instructies

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1:00
What is the radius of a circle?

Slide 28 - Woordweb

Deze slide heeft geen instructies

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1:00
What is the diameter of a circle?

Slide 29 - Woordweb

Deze slide heeft geen instructies

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1:00
What is the circumference of a circle?

Slide 30 - Woordweb

Deze slide heeft geen instructies

timer
1:00
How do we find the area of a circle?

Slide 31 - Woordweb

Deze slide heeft geen instructies

Hard question!
What is a 'segment' of a circle?
timer
0:30
A
a straight line that connects two points on the circumference of a circle
B
a straight line that touches the circumference of a circle at only one point
C
the area enclosed by an arc of a circle and a chord
D
a line that intersects a circle at two distinct points

Slide 32 - Quizvraag

Deze slide heeft geen instructies

Slide 33 - Tekstslide

Deze slide heeft geen instructies

Hard question!
What is a 'tangent' of a circle?
timer
0:30
A
the area enclosed by an arc of a circle and a chord
B
a straight line that connects two points on the circumference of a circle.
C
a line that intersects a circle at two distinct points
D
a straight line that touches the circumference of a circle at only one point

Slide 34 - Quizvraag

Deze slide heeft geen instructies

Slide 35 - Tekstslide

Deze slide heeft geen instructies

Write down 3 things you learned in this lesson.

Slide 36 - Open vraag

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.
Write down 2 things you want to know more about.

Slide 37 - Open vraag

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.
Ask 1 question about something you haven't quite understood yet.

Slide 38 - Open vraag

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.

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