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Description
In this video we'll learn how to find the volume of Spheres. We'll always use the same volume formula, which only requires us to know the length of the radius of the sphere. If we've been given the length of the diameter, we can just take half of the diameter to get the radius, and then plug the radius into the volume formula.
Description
In this video we'll learn how to find the surface area of right rectangular prisms. Since opposite faces of the prism are congruent, we can find the area of the base and multiply it by 2 in order to account for the surface area of the top and bottom; find the area of the left face and multiply it by 2 in order to account for the surface area of the left and right; and find the area of the front face and multiply it by 2 in order to account for the...
Description
In this video we'll learn how to find the surface area of cylinders, which we'll do by finding the area of the base (the area of a circle), and multiplying that by 2 to account for the surface area of the top and the bottom of the cylinder. The surface area of the side we'll find by recognizing that the side is a rectangle with length equal to the circumference of the circular base, and width equal to the height of the cylinder.
Description
In this video we'll learn how to find the perpendicular and angle bisectors of triangles. Perpendicular bisectors are the lines that are perpendicular to each side of the triangle and intersect them at their midpoints. The angle bisectors of a triangle are the lines that divide its interior angles perfectly in half.
Description
In this video we'll learn how to find the surface area of regular pyramids. Since all of the lateral faces of the pyramid are congruent, we can always use the same formula for surface area. We'll just need to know the perimeter of the base, the slant height of the lateral faces, and the area of the base.
Description
In this video we'll learn how to find the surface area of right circular Cones. A right circular cone is a cone whose base is a circle and that has a right angle (90-degree angle) between the base of the cone and it's altitude. When we find the surface area of a cone, we'll use the formula for the area of a circle in order to find the area of the base of the cone, and then we'll use the slant height of the cone in order to find the surface area of...
Description
Twice a year at Chichen Itza the sun casts a shadow on the Temple of Kulkulkan that resembles a snake descending the pyramid's steps-a curved line that is eerily similar to the descending line of x approaching infinity on the graph of the exponential function for the volume of the pyramid. In this program Mayan architecture is used to study the properties of 3-D figures, including square and rectangular pyramids, rectangular prisms, and cylinders....
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