A circle has a circumference of 10π cm. What is the area if this circle? Justify your answer completely.
✐Explanation✐
C = 2πr (circumference of a circle)
A = πr² (area of a circle)
Use the circumference formula to determine r first. Then, use the area formula to determine the answer.
C = 10π
10π = 2πr
r = 5 cm
Substitute [...]
I think of it as cutting the ends off the can and then slicing through the rest of the can so it can be laid out flat to form a rectangle. The area of the circular ends is pir^2 each and the area of the rectangle is LW where the width is the height [...]
does anyone have a link to a list of formulas for the surface area and volume for like spheres, pyramids, cones, trapezoids, parallelograms, etc etc.
Try this one:
http://math.about.com/library/blmeasurement.htm
i have geometry work and only in the 9th grade and its pretty hard but i need a good place to get all the formulas to find area on the internet that isnt blocked by the school.
Without working at your school’s IT department, it’s impossible to know which sites would/wouldn’t be blocked at your school.
http://www.google.com/search?q=geometric+figures+areas&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
In my geometry class, I noticed there is no "proof" for the volume and surface area formula for a sphere. When I looked it up online, Again I found nothing. Does anyone know what evidence there is to back up these formulas?
Both formulas can be derived using calculus.
the volume of an ellipsoid is: 4 π a b c / 3.
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We know that for a triangle in 2d, area =
| 0.5 0.5 0.5 |
| x_1 x_2 x_3 |
| y_1 y_2 y_3 |
Is there a similar formula for triangles in space, with points given as (x,y,z) coordinates?
The 2d determinant formula generalizes in 3d to a determinant formula for the volume of a tetrahedron. [...]
I live in an area where my yard floods out when it rains. Sometimes it takes until the next morning for it to be gone. It has no grass and I want to plant some before summer. I read where too much water can drown the seeds but I have no control over that. I [...]
Areas such as mental application, fielding, fitness or anything else you believe is vital for improvement of your national team.
@MBTM I am sure you dont want your team to impove because whinging and whining is so ingrained in your life that it must be embarassing?
Indian players need to be paid on performance not for just [...]
i need help drawing a square that is equal to 5 square units on a piece of graph paper. please help! pictures or visuals would help too!
a square has four equal sides. A side time a side is the area… so to make a square with an area of 5 the length of each [...]
