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Inessa05 [86]
3 years ago
10

PLEASE HELP with math

Mathematics
1 answer:
MArishka [77]3 years ago
6 0

Answer:

1. 4 * 7 * 11 = 308

2. 7 * 7 * 4/2 = 98

3. 98 + 308 = 406

Hope this helps!

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astraxan [27]

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6

Step-by-step explanation:

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3 years ago
A circle has a circumference of 10. It has an arc length of 9/2. What is the central angle of the arc in degrees?
dem82 [27]

Answer: The central angle of the arc is 162 degrees.

Step-by-step explanation: The information available are as follows;

Circumference of the circle equals 10. Length of an arc equals 9/2. The circumference of a circle is given as;

Circumference = 2Pi x r

That means 2Pi x r = 10.

Also the length of an arc along the same circle is 9/2. Length of an arc is calculated as;

Length of arc = (X/360) x 2Pi x r

Where X is the central angle of the arc

That means;

9/2 = (X/360) x 2Pi x r

We can now substitute for the known values as follows

Length of an arc = (X/360) x 2Pi x r

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By cross multiplication we now have

(9 x 360)/(2 x 10) = X

3240/20 = X

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The angle at the center of the arc is 162 degrees.

6 0
3 years ago
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