
Angles are fundamental to the study of Geometry. All geometry shapes have angles. Each angle has unique properties. The three angles are: obtuse angles, acute angles, and right angles.
Angles.html

An Isosceles triangle is a unique kind of triangle whose properties are often used in geometry. The picture of an Isosceles triangle is shown below.
Isosceles_Triangle.html

Most Isosceles triangles are acute Isosceles triangles. What is the definition of an acute Isosceles triangle? An acute Isosceles triangle is an Isosceles triangle with all of its angles being less than right angle or 90 degrees.
Acute_Isosceles_Triangle.html

Below is a picture of an obtuse Isosceles triangle. But, let us first define what an Obtuse Isosceles triangle is.
Obtuse_Isosceles_Triangle.html

What is a parallelogram? A parallelogram is a quadrilateral or a shape with 4 sides with the following properties. These properties of a parallelogram can also be viewed as parallelogram law.
Parallelogram.html

This section of about the definition of a circle. A circle is often used in geometry and knowing the definition of a circle is the first step towards calculating the area of a circle or the circumference of a circle.
Definition_of_Circle.html

This section is about the arc of a circle. The length of an arc of a circle is expressed in linear unites of measurement such as inches or centimeters.
Circle_Arc.html

Today we are going to calculate the area of a rectangle. First let us define what a rectangle is. Then we are going to calculate the area of a rectangle.
Area_of_a_Rectangle.html

Below is a video showing how to find the area of a rectangle exactly. A rectangle is one of the easier geometrical shape to do calculations with.
How_to_Find_the_Area_of_a_Rectangle.html

Today we are going to find the area of a triangle. Before we do that, we are going to define what a triangle is and what we need in order to calculate the area of a triangle.
Area_of_a_Triangle.html

Below is a video of how to find the area of a triangle. The formula for finding the area of a triangle is very simple as already discussed.
How_to_Find_the_Area_of_a_Triangle.html

Today we are going to calculate the area of a circle. Calculating the area of a circle is easy and we will show you the formula for area of a circle.
Area_of_a_Circle.html

Below is a video showing how to calculate the area of a circle. Finding the area of a circle is easy and there is even a formula for area of a circle to help you calculate the area of a circle.
Calculate_Area_of_a_Circle.html

Today we are going to calculate the area of a parallelogram. But, of course, we must first define what a parallelogram is.
Area_of_a_Parallelogram.html

Below is a video explaining how to find the area of a parallelogram. A parallelogram has many interesting mathematical properties.
How_to_Find_Area_of_Parallelogram.html

A parallelepiped is a very tongue twisted name for a three dimensional square, rectangle or parallelogram. Any cardboard box you see around is most likely a parallelepiped.
Volume_of_Parallelepiped.html

Below is a video showing how to find the volume of a parallelepiped. A parallelepiped is more common in every life than one might think by looking at the name, parallelepiped.
How_to_Find_Volume_of_Parallelepiped.html

Today we are going to teach you how to calculate the volume of a cylinder. The formula for calculating the volume of a cylinder is very useful because there are so many cylinders you are bound to come across in your everyday life.
Volume_of_a_Cylinder.html

We have already discussed how easy it is to calculate the volume of a cylinder and how useful it is to learn how to calculate the volume of a cylinder.
Calculate_Volume_of_a_Cylinder.html

Today we are going to calculate the volume of a cone. A cone is a geometrical object in the shape shown here. Most people are familiar with the shape of a cone such as a ice cream come.
Volume_of_a_Cone.html

Below is a video showing how to calculate the volume of a cone. The video of how to calculate the volume of a cone also shows the formula for the volume of a cone.
Calculate_Volume_of_Cone.html

We previously calculated the volume of a sphere, now we are going to calculate the surface area of a sphere.
Surface_Area_of_a_Sphere.html

Below is a video showing how to find the surface area of a sphere. We have discussed how to find volume of a sphere, now we are going to show you how to find the surface area of a sphere.
How_to_Find_the_Surface_Area_of_a_Sphere.html

The Geometry help lesson video below shows you how to calculate the volume of a sphere using the volume of a sphere formula which will be discussed below.
Volume_of_a_Sphere.html

Below is how to find the perimeter of a rectangle. When dealing with a rectangle in geometry, you will most likely be asked how to find the perimeter of a rectangle, how to find the minimum perimeter of a rectangle or how to find the area of a rectangle.
How_to_Find_the_Perimeter_of_a_a_Rectangle.html

Below is a geometry question using the perimeter of a rectangle. In a geometry problem, you may be given the perimeter of a rectangle and the relationship between its width and length.
Perimeter_of_a_rectangle_example.html