WorksheetsTIGAS QUIZIZZ
Total questions: 12
Worksheet time: 6mins
What is the formula to calculate the area of a circle?
A = r²/2
A = πr²
A = πd
A = 2πr
If the radius of a circle is 14 cm, what is the value of π you should use?
3.1415
3.16
3.14
3.00
Calculate the area of a circle with a radius of 14 cm using the formula πr².
450 cm²
200 cm²
615.44 cm²
615.44 m²
What does the term 'radius' refer to in a circle?
The radius refers to the distance from the center to the circumference of a circle.
The radius is the area of the circle divided by its circumference.
The radius is the diameter of the circle divided by two.
The radius is the total distance around the circle.
If the radius is doubled, how does it affect the area of the circle?
The area of the circle increases by a factor of 3.
The area of the circle decreases by a factor of 2.
The area of the circle increases by a factor of 4.
The area of the circle remains the same.
What is the area of a circle with a radius of 7 cm?
150.00 cm²
153.86 cm²
160.00 cm²
154.00 cm²
How would you express the area of a circle in square centimeters?
A = πd square centimeters
A = r² square centimeters
A = 2πr square centimeters
A = πr² square centimeters
If the area of a circle is 616 cm², what is the radius?
10 cm
14 cm
16 cm
12 cm
What is the relationship between diameter and radius in a circle?
The radius is twice the diameter.
The diameter is half the radius.
The radius and diameter are equal.
The diameter is twice the radius.
If you increase the radius of a circle to 21 cm, what will be the new area?
1385.44 cm²
923.88 cm²
314.16 cm²
462.84 cm²
Why is it important to understand the concept of radius when calculating the area of a circle?
The radius is irrelevant when calculating the area of a circle.
Understanding the radius is only necessary for calculating the circumference, not the area.
It is important to understand the concept of radius because the area of a circle is calculated using the formula A = πr², where r is the radius.
The area of a circle is calculated using the diameter instead of the radius.
If a circle has an area of 154 cm², what is its radius?
5 cm
8 cm
7 cm
10 cm
