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3 years ago

The circumference of a circle is approximately 39.25 mm. What is the length of the diameter?

Mathematics

1 answer:

melomori [17]3 years ago

6 0

Answer:

<h2>12.5 millimeters (mm).</h2>

Step-by-step explanation:

Explain/define:

CIRCUMFERENCE: THE DISTANCE AROUND A CIRCLE.

DIAMETER: THE LENGTH OF A STRAIGHT LINE THROUGH THE CENTER OF A CIRCLE.

Mathematics: Formula

$d=c/3.14$

$d-diameter$

$c-circumference$

Mathematics: Solve

To find the length of the diameter from the circumference, divide the circumference by pi. The quotient is the diameter.

3.14 is often used for pi.

$39.25/3.14=12.5.$

Conclude:

Therefore, the length of the diameter of the circle is 12.5 millimeters (mm).

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Solve triangle ABC, when A= 6, B=10 and c=12

valentinak56 [21]

Use cosine rule,

cos(A)=(b^2+c^2-a^2)/(2bc)
=(10^2+12^2-6^2)/(2*10*12)
=13/15
A=29.926 degrees.................................(A)

cos(B)=(c^2+a^2-b^2)/(2ca)
=(12^2+6^2-10^2)/(2*12*6)
=5/9
B=56.251 degrees.................................(B)

cos(C)=(a^2+b^2-c^2)/(2ab)
=(6^2+10^2-12^2)/(2*6*10)
=-1/15
C=93.823 degrees.................................(C)

Check:29.926+56.251+93.823=180.0 degrees....ok

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3 years ago

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kondaur [170]

Answer:

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Step-by-step explanation:

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3 years ago

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fenix001 [56]

2 notebooks* ($20/ 5 notebooks)= $8.
(Note that the unit cancels out so you get the answer)

Final answer: $8~

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3 years ago

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3 years ago

Reciprocate 2 5/9 plz and thx

ZanzabumX [31]

Answer: 9/23

Step-by-step explanation:

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2 years ago