0
How long a piece of wire would you need to form a circular arc subtending an angle of 1.3 if the radius of the arc is 8.6 cm?
Wiki User
∙ 11y ago
That depends on whether the angle is 1.3 degrees, radians, or some other unit. The first step is to calculate the circumference of a circle with radius 8.6 cm. This is 2 pi times the radius. Pi being approximately 3.14, this is about 54.0 cm. This is an arc of 360 degrees. So if you mean 1.3 degrees, we divide 360 by 1.3 and get about 276.9. Finally, dividing 54.0 cm by 276.9 gives about 0.195 cm. A more direct method is to divide the circumference by 360 to get 0.15 cm per degree, and multiply that by 1.3 to get 0.195 cm.
If you mean 1.3 radians, that is even easier, since by definition, a radian subtends an arc whose length equals the radius. So we just multiply the radius 8.6 cm by 1.3 and get 11.18 cm.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Why pi in area and angle?
For a square of side a, the area is simple: a2. The perimeter is 4a. How do you deal with a circle, of diameter a? It's obviously less than a2. It turns out to be pi/4 times a2. Or pi times radius squared where pi has been worked out to be 3.1415..... As for angle, for lots of applications it appears a good way of measuring angle by using the length of a piece of circumference of a circle divided by the radius. The units for this is radians. A length of circumference equal to the circle radius gives an angle of 1 in these units when you draw straight lines from the ends of this bit of circumference to the centre. So the whole way around the circle (360o) then is 2.pi.r divided br r, radians, which is just 2 pi radians.
A circular cherry pie has a diameter of 11 inches and is cut into 8 equal size pieces what is the area of each piece of pie?
Each slice is one-eighth of the total area. The total area is 2 times pi times the radius, or pi times the diameter. The area is then 11pi, or 34.557. Each piece is one-eighth of that, (11/8)pi or 4.319
What is an 8 unit protractor?
A protractor that can be made from a square piece of tracing paper or wax paper to make an angle measurer. It is divided into 8 equal units. The units are labelled from 0 to 7 clockwise and counterclockwise. To measure an angle, count how many units fit the angle
To convert a grid azimuth to a magnetic azimuth you will need to know g-m angle. where would you look for this piece of information?
Declination Diagram
It takes ten identical pieces to form a circular track for a pair of toy racing cars If the inside of each piece is 3.4 inches shorter than the outside arc what is the width of the track?
Length of outer track = sum of length of 10 pieces = circumference of the outer circleif R is the Radius of outer circle then...Circumference of the outer track = 2pi*RSimilarly the circumference of the inner track (with radius r) = 2pi*rlength of each outer piece is 3.4 inch more than length of inner pieceSo total outer length is 10*3.4 =34 inches more than the inner length.=> Outer Circumference - Inner Circumference = 34 inches=> 2pi*R - 2pi*r = 34=> 2pi(R -r) = 34=> R-r = 34/2pi = 5.41 inches=> R-r = Width of the track = 5.41 inches1 year ago
Can you cut a radius in a piece of glass?
Yes, you need a circular glass cutter. It kind of looks like a compass.
Is a radian the round line of a piece of pie?
If the length of the round edge of a piece of pie is identical to the length of the two straight sides of the piece of pie, the angle between the two straight sides is 1 radian.An angle of 1 radian results in an arc with a length equal to the radius of a circle. A radian is equal to an angle of approximately 57.295 degrees at the center of a circle between two radii separated at the circumference by an arc equal in length to the radius.
What geometric shape looks like a piece of cheese?
An ellipsoid with equal radii along two axes and a different radius in the third (a flattened sphere or a circular ellipsoid).
What is a piece of a circular region that is shaped like a piece of pie?
A Sector.
Is a screw driver a wheel and axle?
No, a wheel and axle consists of two different circular pieces of different sizes. The larger circular piece is the wheel in the system, and the smaller circular piece is the axle.
What is the radius of the corners of the case on the iPhone 4S?
About the same radius as a threepenny piece.
What is a circular skirt?
A circular skirt is a skirt that is done by cutting just a circle out of a piece of fabric.
What is the formula to calculate sector?
A sector is a part of a circle which looks the same shape as a piece of a circular pie. You probably remember that Pi charts look like a circular cake cut into portions. We can calculate the area of the sector of a circle if we know the angle between the two straight sides and the radius of the circle. Now the area of a complete circle is Pi x square of radius, If the radius is 12 cm then the circle's area will be Pi x square of 12 square centimetres. But that is for the full circle. If the sector's angle is 60 degrees, that would mean that the area of the sector would be 60 degrees/360 degrees which equals 1/6; so finally, the area of the sector is (Pi x 12 squared) divided by 6 = 75.398 sq cm )correct to 4 decimal places).
What is peep site?
A circular piece of metal with a hole in it.
When a piece of a circle is determined by two radius that piece is best called a?
Diameter
How do you make a right angle out of a piece of string?
All you have to do to make a right angle out of a piece of string is put the string in the shape of an L. This will make a right angle
How do you get to the Orange Archipelago?
Peal the orange circular in one piece.
