the formula for the circumference of a circl is c = 2 nr determine the circumference when the radius r is 10 cm
2 answers:
Answer:
20π cm or approximately 62.8 cm
Step-by-step explanation:
» <u>Concepts</u>
The circumference of a circle is the distance, or perimeter, around a circle in a certain unit such as centimeters. The formula to find the circumference, as stated, it 2πr, where r = radius.
» <u>Application</u>
In this case, we're asked to find the circumference of the circle using the formula 2πr. We're also given the radius as 10 cm.
» <u>Solving</u>
-
- 20π cm
or
- 62.8 cm
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Answer: second option
Step-by-step explanation:
You know that it is a right triangular window frame.
Then, you can use the Pythagoren Theorem to find the lenght of the third side:
Where "a" is the hypotenuse (or the longest side), and "b" and "c" are the legs .
Then, you can solve for one of the legs:
Since you know the lenght of the hypotenuse and the lenght of one leg, you can substitute values.
Therefore, you get: