This lesson contains 31 slides, with interactive quizzes and text slides.
Lesson duration is: 50 min
Items in this lesson
Circle parts
Area, circumference and degrees
Slide 1 - Slide
what are the differet parts of a circle
Slide 2 - Mind map
A
sector
B
diameter
C
Segment
D
radius
Slide 3 - Quiz
A
sector
B
diameter
C
radius
D
chord
Slide 4 - Quiz
A
sector
B
circumference
C
arc
D
chord
Slide 5 - Quiz
A
sector
B
segment
C
Arc
D
chord
Slide 6 - Quiz
A
sector
B
segment
C
tangent
D
chord
Slide 7 - Quiz
A
sector
B
segment
C
Arc
D
chord
Slide 8 - Quiz
A
sector
B
segment
C
tangent
D
diameter
Slide 9 - Quiz
A
sector
B
circumference
C
tangent
D
diameter
Slide 10 - Quiz
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.
timer
4:00
Slide 11 - Slide
What is the diameter of a circle?
timer
0:30
A
A line segment going from one point of the circumference to another but does not go through the centre.
B
The distance across the circle going through the centre.
C
The distance from the centre of a circle to the outside.
D
The distance once around the circle.
Slide 12 - Quiz
What is the radius of a circle?
timer
0:30
A
A line segment going from one point of the circumference to another but does not go through the centre.
B
The distance across the circle going through the centre.
C
The distance from the centre of a circle to the outside.
D
The distance once around the circle.
Slide 13 - Quiz
Radius of A Circle
Radius is half the diameter
Slide 14 - Slide
What is the relationship between the radius and the diameter of a circle
A
Diameter = 2 x Radius
B
Diameter = Radius ÷ 2
C
Diameter = √Radius
D
Diameter = Radius²
Slide 15 - Quiz
What is the circumference of a circle?
timer
0:30
A
A line segment going from one point of the circumference to another but does not go through the centre.
B
The distance across the circle going through the centre.
C
The distance from the centre of a circle to the outside.
D
The distance once around the circle.
Slide 16 - Quiz
What is the area of a circle?
timer
0:30
A
A line segment going from one point of the circumference to another but does not go through the centre.
B
The space inside a 2D shape.
C
The distance from the centre of a circle to the outside.
D
The distance once around the circle.
Slide 17 - Quiz
What is the diameter of a circle if its radius is 6cm?
timer
0:15
A
3cm
B
12cm
C
10cm
D
12mm
Slide 18 - Quiz
Using the diameter
Use the formula C = πd to find the circumference if you know the diameter. In this equation, "C" represents the circumference of the circle, and "d" represents its diameter.
That is to say, you can find the circumference of a circle just by multiplying the diameter by pi. Plugging π into your calculator will give you its numerical value, which is a closer approximation of 3.14 or 22/7.
Diameter means a straight line segment that passes through the center of the circle and has its endpoints on the sides of the circle.
Slide 19 - Slide
What is the circumference of a circle with a radius of 3cm? (Remember C=2πr, where π=3.14)
timer
1:00
A
16.85cm
B
19.85cm
C
17.85cm
D
18.85cm
Slide 20 - Quiz
What is the circumference of a circle with a diameter of 10cm? (Remember C=2πr, where π=3.14)
timer
1:00
A
30.42cm
B
31.42cm
C
32.42cm
D
33.42cm
Slide 21 - Quiz
What is the area of a circle with a radius of 4cm?
Slide 22 - Open question
What is the area of the circle
π=3.14
Slide 23 - Open question
What is the area of the circle
π=3.14
Slide 24 - Open question
What is the area of the circle
π=3.14
Slide 25 - Open question
How many degrees are there in one quarter of a circle?