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3 years ago

D=7.9cm. what is the circumference and area of the circle?

2 answers:

8 0

Circumfrence: pi times diameter
7.9* $\pi$
circumfrence is approximatley 24.806

area: $\pi r^2$
a= $\pi$ *(1/2(d))^2
a= 48.99

Lera25 [3.4K]3 years ago

6 0

You multiply 7.9 by pi to get an answer of 24.8 cm for the curcumference, and then square the raduis, 3.95, to get 15.6025, and then multiply that by pi to get 48.9 cm squared for the area. (I used 3.14 for pi and rounded to the first decimal place)

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3 years ago

Read 2 more answers

The sector of a circle shown to the left has its center at point OO. The arc XYZXYZ has length 10.810.8, and the central angle X

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Step-by-step explanation:

Since we have given that

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$1\ radian= 57.295779513\textdegree\\\\1.8\ radians=1.8\times 57.3\textdegree\\\\1.8\ radians=103.14\textdegree$

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3 years ago

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Inessa05 [86]

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Step-by-step explanation:

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4 years ago

Professor Plum is standing 10 feet from a streetlamp. The light from the lamp is making his

skelet666 [1.2K]

Answer:

15.10 ft

Step-by-step explanation:

It would be helpful to draw the figure from the problem statement above. Drawing it, would give you a right triangle shape where the base is equal to 10 ft + 8 ft = 18 ft with the angle of 40 degrees. We use knowledge on trigonometric functions to solve this.

tan (theta) = opposite side / adjacent side

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