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Exercise 5 - Language in use
You probably know the number called pi. It equals about 3.14159. Look at the circles below. For every circle, no matter how big or small, one thing is always true: Circumference ÷ diameter = pi.
So here is your question. In the formula C/d = pi, which are variables?

Click on the 2 correct answers.
formula C/d = pi

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