Friday

September 19, 2014

September 19, 2014

Posted by **bs** on Monday, February 11, 2013 at 10:53am.

3.Find the length of the arc if a circle if the degree if the arc is 120o and the length of the radius is 8cm.

4. A circle has a radius of 7. Find the diameter (D) and the (A).

5. Find the circumferemce of a circle if the area is 9/25pift^2.

- Math rem -
**Reiny**, Monday, February 11, 2013 at 11:32am#1 and #2 are the same type of problem

I will do #2

whole circumference = 2π(8) = 16π

but 120° is 1/3 of the circle, thus the arc is 1/3 the circumference

= (1/3)(16π) = 16π/3 cm or appr 16.755 cm

#4 ??? come on now!!!

#5 area = πr^2

πr^2 = (9/25)π

r^2 = 9/25

r = 3/5

circumf = 2πr = 2π(3/5) = 6π/5 ft or appr. .....

**Answer this Question**

**Related Questions**

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

geometry - A 45 degree arc of circle D has the same length as a 30 degree arc of...

Geometry - A 60 degree arc, of circle A, has exactly the same lenght as a 45 ...

Math - I think this will be the last one. Find the radius of circle C if the ...

Trig - Find the radian measure of the central angle of a circle of radius r that...

maths - Im confused can any1 help me on this question ?? or try and put me on ...

maths - find the radius of the circle if length of arc is 4p cm and angle made ...

Bobby - Find the length (in cm) of an arc of a circle with radius 12 cm if the ...

precalculus - The question is...find the radian measure of the central angle of ...

Geometry - Find the arc length, of a 130 degree arc, in a circle with a diameter...