Tuesday

September 2, 2014

September 2, 2014

Posted by **Dylan** on Friday, May 6, 2011 at 11:45am.

- geometry -
**Anonymous**, Friday, May 6, 2011 at 12:47pmThe ratio of a circle's circumference to its radius is 2ð

C=2rð

120°/360°=1/3

The length of the chord connecting the radii of the arc:

L=2rð/3

L=2*6*3.14159/3=37.69908/3= 12.56636 cm

- geometry -
**Anonymous**, Friday, May 6, 2011 at 12:47pmð=pi number

- geometry -
**Reiny**, Friday, May 6, 2011 at 3:37pmThe answer given by "anonymous" cannot be correct.

How can the chord be longer than the diameter, which would be only 12 cm ?

Draw an altitude from the centre to the chord creating two right-angled triangles with angles 30, 60 and 90°

If x is half of the chord

cos 30° = x/6

x = 6cos30 = 6√3/2 = 5.196

so the chord is 2(5.196) = 10.392

**Answer this Question**

**Related Questions**

Geometry - What is the circumference of the circle if the radius is: 5x-My ...

Geometry - in a circle of radius 11 cm, find the area of the segment bounded by ...

Geometry - What is the radius if: degree of measurement of arc=30 length=1/3xy(...

geometry - arc AB is 55 degrees. the radius of the circle is 4 inches. what is ...

geometry 3 - Given: Circle O with radius of length 4 units. measurement of arc ...

Math rem - 2.Find the length of the arc in a circle if the radius of the circle ...

math - Whats the difference between an arc [of a circle]'s length and measure? ...

maths - an arc of a circle subtends a central angle of 5pi/6 radians.if the ...

Math - In a circle , the radius is 68 units and a chord of the circle is 120 ...

Math - In a circle , the radius is 68 units and a chord of the circle is 120 ...