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matrenka [14]
3 years ago
14

If the circumference is 31.4, what are the radius and the area?

Mathematics
1 answer:
jekas [21]3 years ago
7 0

Answer:

radius = 5 units

area of a circle = 15.7units²

Step-by-step explanation:

given that the circumference of a circle = 31.4

radius = ?

recall that the formulae for finding the circumference of a circle  =  2πr

circumference of a circle  = 2 x 3.14 x r

31. 4 = 6.28r

divide both sides by the coefficient of r which is 6.28

31.4/6.28 = 6.28r/6.28

5 = r

radius = 5 units

therefore the radius of the circle whose circumference is 31.4 units is evaluated to be 5units

to find the area of the circle

recall the formula = πr²

area of a circle = 3.14 x 5²

area of a circle = 3.14 x 25

area of a circle = 15.7units²

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For part one, this means that the y value (the second value) is -8, and since we know that y=3x-2, we can say that -8=3x-2.
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3 years ago
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#1 alright so if the ratio is 5:4 adding them together is 9 but we want 36 as the perimeter sooo

36/9=4

So multiply both the 5 and the 4 makes....

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The 20 and 16 show the total side of the length Andy width so we need to divide them by two so...

(20/2):(16/2)=10:8 so the width would be 8

Check:10(2)+8(2)=20+16=36 yay on to the next one!

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