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3 years ago

The diameter of a circle is 8 feet. What is the angle measure of an arc a feet long?

Mathematics

1 answer:

fiasKO [112]3 years ago

4 0

Answer:

Given: circle

diameter = 10 cm => radius (R) = 5 cm

Find: measure of angle bounding sector = 11 π sq. cm.

Plan: determine what part of the circle’s total area equals the sector’s area.

Total Area of Circle A = π R^2 = π 5^2 = 25 π sq. cm.

Therefore: Sector Area = 11 π cm^2/25 π cm^2 = 11/25

Since the sector is 11/25 th of the circles area, the sector angle will measure 11/25 th of the circle’s circumference. They are proportional.

C = 2 π R = 2 π (5) = 10 π cm

Sector Arc = measure of sector angle = 11/25 (10 π) =

22π/5 radians

Answer: Sector Arc = 22π/5 Radians

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4 years ago

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3 years ago

A 9m long ladder rests at 9m below a vertical wall. If the angle of elevation of the top of the wall from the foot of the ladder

Arte-miy333 [17]

Height of the wall is 27 m.

<u>Explanation:</u>

Let the height of the wall = h

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3 0

4 years ago

4/9 expressed as a percent is

Elan Coil [88]

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4 0

4 years ago

Read 2 more answers

Imagine you measure the length of 15 cars, and then sum that length, in order to see how big a parking lot must be. You do this

Ugo [173]

Answer:

± 15 cm

Step-by-step explanation:

In the first case, since the measurement is 1 cm too long or too short, the error is ± 1 cm.

In the second case, the uncertainty or error is also ± 1 cm.

Now, since there are 15 cars, and there is an error of ± 1 cm in each measurement, by the error formula the total error in the sum of both cases is 15 × ±1 cm = ± 15 cm

So, the total error in both cases is ± 15 cm.

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3 years ago