We found 293 resources with the keyterm radius
Circles: Radius, Diameter and Circumference
11 mins 4th - 11th
Fascinating discussion regarding the origin of Pi accompanies a detailed explanation of how to find the circumference of a circle. Since this is the first installment in a series on circles, the concept of circumference is separated into...
What is the Formula for the Volume of a Sphere?
5 mins 6th - 10th
The formula of a sphere is related to the formula of a cylinder? How? Oh, radius and pi. Watch this video and observe how the instructor illustrates just how these two formulas are connected. Then plug in the known values and solve this...
What is the Formula for the Volume of a Cylinder?
6 mins 6th - 10th
Finding the volume of a cylinder entails using two formulas: the formula for the area of a circle and the formula for volume. The area of the given circle must be solved because that value is used in the formula for volume. Watch this...
How Do You Find the Surface Area of a Sphere?
3 mins 6th - 12th
What do a basketball, a bowling ball, and a ping pong ball all have in common? They are spheres. So how do you measure the surface area of a sphere? Yes, there is a formula and all you have to do is know one measurement of the sphere to...
How Do You Find the Lateral and Surface Areas of a Cylinder?
6 mins 9th - 11th
There are three formulas that need to be used to solve this problem. The formula for the lateral area of a cylinder, the formula for the circular base of the cylinder, and then the formula for the surface area. It seems like quite a bit,...
How Do You Find the Lateral and Surface Areas of a Cone?
5 mins 7th - 10th
The lateral surface area of a cone. Hmmm, what does that mean? Oh, it means the part you see if the cone was sitting on a flat surface, so it does not include the base. But if you want to include the base then it would be finding the...
How Do You Find the Slant Height of a Cone?
5 mins 9th - 10th
Use the Pythagorean theorem formula to find the slant height of a cone. If the height of the cone and the radius of the base are given, using the Pythagorean theorem formula will be a piece of cake. Just plug in the values given and solve.
How Do You Find the Radius of a Circle if You Know the Circumference?
4 mins 5th - 8th
So you know the circumference of a circle but not the radius. This tutorial shows you two different formulas commonly associated with circles, determines which formula to use, then puts the formula to work. You'll have no problem...
How Do You Find the Circumference of a Circle if You Know the Diameter?
3 mins 6th - 10th
There are two formulas that can be used to find the circumference of a circle. Choose the appropriate formula depending on the given value in the problem. After selecting the correct formula, solve the problem using 3.14 as an estimation...
What is the Formula for the Area of a Sector of a Circle?
6 mins 9th - 12th
Are you looking for the formula for the area of a sector of a circle? But what's a sector? A sector is just a fraction of the area of a circle. Follow the instructor as she illustrates and labels the different parts of a circle. She also...
How Do You Find the Area of a Circle if You Know the Radius?
3 mins 6th - 8th
There are basically two things you need to know to find the area of a circle. First, you need to use the correct formula. Second, you have to know the value of the radius. If you know these two things then all you have to do is plug the...
How Do You Find the Area of a Circle if You Know the Diameter?
4 mins 6th - 8th
Do you know the formula to find the area of a circle? Do you know the value of pi? Do you know what the relationship is between diameter and radius? Yes? Then you can solve this problem. If your scholars don't know this formula then this...