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e-lub [12.9K]
3 years ago
9

Work out the area of this circle

Mathematics
2 answers:
MaRussiya [10]3 years ago
4 0
Area of a circle = pi * r^2

Pi = 3.142
r = 4

A = 3.142 (4*4)
A = 3.142 * 16
A = 50.272 cm^2
DIA [1.3K]3 years ago
3 0

Answer:

50.24 or 50.272

Step-by-step explanation:

Square radius and then times by 3.14 or 3.142

4^2*3.14 = 50.24

4^2*3.142 = 50.272

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Which is the correct formula to find the distance between two points (p,q) and (m,n)?
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Answer:

The answer is d = √[(p - m)² + (q - n)²] ⇒ first answer

Step-by-step explanation:

* The distance between any to points (x1 , y1) , (x2 , y2) is

- d = √[square the difference of x- coordinates plus

        square the difference of y-coordinates]

∴ d = √[(x2 - x1)² + (y2 - y1)²] or

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* x2 - x1 is the horizontal distance (h) and y2 - y1

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- By using Pythagoras theorem

∴ d = √[h² + v²]

∵ The two points are (p , q) and (m , n)

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∴ d² = (p - m)² + (q - n)²

∴ d = √[(p - m)² + (q - n)²]

∴ The answer is d = √[(p - m)² + (q - n)²] ⇒ first answer

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