# Mathematics Form 2 Circle -2

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
| By Projectmmp
P
Projectmmp
Community Contributor
Quizzes Created: 2 | Total Attempts: 10,133
Questions: 10 | Attempts: 825  Settings  • 1.

### Figure shows distance from P to Q is 12cm. the radius is 40cm. Find ° x. Use π = 3.142

• A.

20°

• B.

17.19°

• C.

32.42°

• D.

23°

B. 17.19°
Explanation
angle / 360 * 2 (3.142)(40) = 12
angle = 17.19 °

Rate this question:

• 2.

### Figure shows a pizza with diameter 20cm. The pizza is cut into 8 equal pieces. Find the length of arc for each pieces. Use π = 3.142

• A.

8.56 cm

• B.

10.11cm

• C.

14.3 cm

• D.

7.855 cm

D. 7.855 cm
Explanation
45 /360 * 2 (3.142) (20/2) = 7.855cm

Rate this question:

• 3.

### The area of colored sector is 1732.5 cm ². Find circumference of the circle. Use π = 22/7

• A.

31.5 cm

• B.

96 cm

• C.

124.64 cm

• D.

89.5 cm

A. 31.5 cm
Explanation
angle of centre = 360 - 160 = 200
angle of centre / 360 = area of sector /area of circle

Rate this question:

• 4.

### Use π =3.142. Find circumference of circle with diameter 10cm. The answer isUse � =22—7Use � =22—7

31.42cm, 31.4cm,31.42,31.4
Explanation
2pi r, 2pi d

Rate this question:

• 5.

### We use the formulae πr2  to calculate circumference of a circle.

• A.

True

• B.

False

B. False
Explanation
πr² for area of circle.

Rate this question:

• 6.

### Calculate the radius and the circumference of a circle with area 3160 cm². Use π = 3.142

• A.

31.72cm, 178.5cm

• B.

31.72cm, 199.3cm

• C.

40.65cm,199.3cm

• D.

50.90cm, 144.4cm

B. 31.72cm, 199.3cm
Explanation
r=Squareroot(A /π)
π=3160 π≈31.71528
C=2πr=2*π*31.72 ≈ 199.30264

Rate this question:

• 7.

### Calculate the radius and the area of a circle with circumference 24.43 cm. Use π = 3.142

• A.

4.44cm, 51,5 cm²

• B.

3.89cm, 47.54cm²

• C.

3.89cm, 60 cm²

• D.

4.44cm, 57.65 cm²

B. 3.89cm, 47.54cm²
Explanation
r=C/2π
=24.43/2*π ≈ 3.89

A=πr2=π*3.89 ≈ 47.53889

Rate this question:

• 8.

• A.

The part of a circle enclosed by two radii of a circle and their intercepted arc.

• B.

A portion of the circumference of a circle.

• C.

The distance across a circle through its center.

• D.

A straight line segment whose endpoints both lie on the circle

D. A straight line segment whose endpoints both lie on the circle
Explanation
This answer is not true about a sector. A sector is actually the part of a circle enclosed by two radii of a circle and their intercepted arc.

Rate this question:

• 9.

### Calculate the radius and the diameter of a circle with area 202.25 cm ². Use π = 3.142 Match the correct answers.

• A.

11cm, 22cm

• B.

9.36cm, 19.25cm

• C.

8.02cm, 16.4cm

• D.

13.4cm, 26.8cm

C. 8.02cm, 16.4cm
Explanation
The formula to calculate the area of a circle is A = πr^2, where A is the area and r is the radius. In this case, the area is given as 202.25 cm^2. By rearranging the formula, we can solve for the radius.

202.25 = 3.142 * r^2

Dividing both sides by 3.142, we get:

r^2 = 64.5

Taking the square root of both sides, we find:

r = 8.02 cm

The diameter of a circle is twice the radius, so:

d = 2 * r = 2 * 8.02 = 16.04 cm

Therefore, the correct answer is 8.02 cm for the radius and 16.04 cm for the diameter.

Rate this question:

• 10.

### X is straight line segment that passes through the center of the circle and whose endpoints lie on the circle. X is

diameter
Explanation
A diameter is a straight line segment that passes through the center of a circle and whose endpoints lie on the circle. In this case, X is described as a straight line segment that passes through the center of the circle and has its endpoints on the circle. Therefore, X is a diameter of the circle.

Rate this question:

Related Topics Back to top