Practical Problem: Height of a Stack of Pipes
The Pythagorean Theorem can be used to solve problems involving rectangles and circle. A practical problem involves finding the height of a stack of pipes.
Practical Problem: Can the Truck Fit Under the Underpass?
The Pythagorean Theorem can be used to solve problems involving the radius of a pipe. A practical problem involves finding the height of a truck that is carrying a stack of pipes.
Practical Problem: Finding Volume
A practical problem about volume is solved using division of a rational expression.
Area and Volume: Finding the Area of a Circle
This clip explains that, to find the area of a circle, "
we multiply pi (approximately 3.14) by the radius squared. The clip also includes practical problems, one of which includes the circle's diameter but not its radius.
Area and Volume: Finding the Volume of a Cylinder
This clip explains that finding the volume of a cylinder is similar to finding the volume of a rectangular solid, but "
since a cylinder has a circle at its base instead of a rectangle
to find the volume of a cylinder, we multiply the area of a ci...
Perimeter: Finding the Length of a Semi-Circle
This clip uses practical problems to explain how to find the length of a semi-circle. "The length of the semi-circle is half the length of the circumference," the clip states. "That means, once we know the circumference of a circle, we can find the ...
Perimeter: Summary: Perimeter
This clip summarizes how to find the perimeter of several kinds of polygons. It explains the difference between irregular and equilateral polygons, and also explores the parts of a circle and how, in conjunction with pi, they can be used to find the...
Perimeter: Circles: Circumference, Radius and Diameter
This clip explores the perimeter of circles. "The distance around a circle is called its circumference," the clip explains. "One way to find the circumference of a circle is to know its diameter." The clip then talks about the use of pi ("
the valu...
Angles, Arcs and Sectors: Angles, Circles and Sectors
This clip looks at the sector, a fraction of a circle's area formed by a central angle and its arc. "We can find the area of a sector," the clips explains, "
by multiplying the ratio of the central angle to the circle by the area of the circle."
Angles, Arcs and Sectors: Angles, Circles and Arcs
This clip includes several practical problems in its discussion of angles in circles. It also explains how to find the length of an arc.