Question

B. Find the diameter of each circle whose radius is given below.
1. 8 cm
2. 4.7 cm
3. 6.8 cm
4. 5.2 cm
5. 1
6. 7 cm
7. 8.3 cm
8. 3.6 cm

C. Find the radius of each circle whose diameter is given below.
1. 7 cm
2. 10.4 cm
3. 6 cm
4. 5.8 cm
5. 8 cm
6. Il cm
7. 3.6 cm
8. 7.2 cm

D. Find the circumference of each circle.
1. Diameter = 4 cm
2. Diameter = 7 cm
3. Diameter = 10 cm
4. Radius = 1.4 cm
5. Radius = 4.5 cm
6. Radius
1.75 cm

E. Find the diameter of each circle with the given circumference.
1. 94.2 cm
2. 62.8 cm
3. 47.1 cm
4. 157 cm
5. 81.64 cm 6. 56.52 cm 7. 10.99 cm
8. 188.4 cm


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Answer 1

Answer:

B 1. 16 cm

2. 20.8cm

3. 12 cm

4. 10.4 cm

5. 2 cm

6. 14 cm

7. 16.6 cm

8. 7.2 cm

C. 1. 3.5cm

2. 5.2cm

3. 3 cm

4. 2.9cm

5. 4cm

6. 5.56cm

7. 1.8cm

8. 3.6 cm

D. 1. 12.56cm

2. 22cm

3. 31.4 cm

4. 8.8 cm

5. 28.26 cm

6. 10.99 cm

E. 1. 30 cm

2. 20 cm

3. 15 cm

5. 26 cm

4. 50 cm

6. 18 cm

7. 3.5 cm

8. 60 cm

Answer 2

As we know that diameter is = 2×radius

B .1. 8×2=16cm

2. 4.7 × 2 = 9.4cm

3. 6.8×2 = 13.6 cm

4. 5.2×2 = 10.4 cm

5. 1×2=2 cm

6. 7×2 = 14cm

7. 8.3×2= 16.6 cm

8. 3.6×2= 7.2cm

C. as we know that radius = d/2

1. 7÷2 = 3.5 cm

2. 5.2 cm

3. 3cm

4. 2.9cm

5. 4cm

6 5.5cm

7. 1.8cm

8. 3.6cm

D. circumference = 2 pie r

1. r = d/2 = 4/2 = 2cm

C= 2×22/7×2= 88/7 cm

2 . 22cm

3. 220/7cm

4 . 8.8cm

5. 198/7cm

6. 11cm

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