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anzhelika [568]
3 years ago
10

What is the diameter and circumference of 6.7

Mathematics
2 answers:
irinina [24]3 years ago
8 0

3.572

Area of a circle in terms of radius:

Area = π · r2 = 3.14 · 1.072 = 3.57 square meters.

In terms of diameter:

Area = π · (d

2

)2 = 3.14 · (2.13

2

)2 = 3.14 · (1.07)2 = 3.57 square meters.

In terms of circumference:

Area = C2

4π

= 6.72

4π

= 44.89

(4 · 3.14)

= 44.89

12.56

= 3.57 square meters.

Note: for simplicity, some results may be rounded to nearest hundredth and π was rounded to 3.14. See formula details below in this page.

A circle of radius = 1.066 or diameter = 2.133 or circunference = 6.7 meters has an area of 3.572 square meters which is equal to:

3.572E-6 square kilometers (km²)

35720 square centimeters (cm²)

0.0008827 acres (ac)

0.0003572 hectares (ha)

1.379E-6 square miles (mi²)

4.272 square yards (yd²)

38.45 square feet (ft²)

5537 square inches (in²)

Formulae:

Circle area formula

statuscvo [17]3 years ago
4 0

Answer:

D=2.133

Step-by-step explanation:

the circumference is to 2π • r where r is the radius, which is equal to half the diameter D so we have:

6.7 = 2 • π • r

r= d/2

substituting the 2nd equation to the first gives:

6.7 = 2 • π • d/2

6.7 = π • d

d = 6.7/π = 2.133

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Answer:

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Step-by-step explanation:

Fundamental identities:

These following trigonometric identities are used to solve this question:

\sin^{2}{\theta}+\cos^{2}{\theta} = 1

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\frac{11}{4} = \frac{1}{\sin{\theta}}

11\sin{\theta} = 4

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Since the tangent is negative, the cosine is negative. So

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\frac{16}{121} + \cos^{2}{\theta} = \frac{121}{121}

\cos^{2}{\theta} = \frac{105}{121}

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\cot{\theta} = \frac{\cos{\theta}}{\sin{\theta}}

\cot{\theta} = \frac{-\frac{\sqrt{105}}{11}}{\frac{4}{11}}

\cot{\theta} = -\frac{\sqrt{105}}{11}

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