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Margarita [4]
3 years ago
13

A study in which conditions are under the direct control of the investigator.

Mathematics
1 answer:
Andre45 [30]3 years ago
3 0

Answer:

Experimental study

Step-by-step explanation:

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The diameter of a circle is 4 centimeters. What is the length of a 45° arc?​
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Step-by-step explanation: If the diameter has been given as 4 centimeters, then the radius would be diameter divided by 2, and that equals 2.

With the radius now known as 2, we can calculate the length of the arc as follows;

Length of an arc = (Ω/360) x 2πr

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