Circle
Radius of a Circle – the distance from the center of a circle to any point on its circumference.
Diameter of a Circle – the distance across the circle, passing through a center.
Circumference of a Circle – the distance around a circle.
Area of a Circle – measures the space contained within a circle.
Rectangle
Area of a Rectangle – representing the space contained within a rectangle.
Perimeter of a Rectangle – the total distance around a rectangle.
Width of a Rectangle – the distance across one side of a rectangle.
Diagonal of a Rectangle – the line segment that connects opposite corners, representing the longest distance across the rectangle.
Square
Area of a Square – representing the space contained within a square.
Perimeter of a Square – the total distance around a square.
Diagonal of a Square – the line segment that connects opposite corners, representing the longest distance across the square.
Length or Width of the Side of a Square – the distance across one side of a square.
Triangle
Area of a Triangle – the space contained within a triangle.
Area of an Equilateral Triangle – the space contained within an equilateral triangle.
Semicircle
Area of a Semicircle – the space contained within a semicircle.
Circumference of a Semicircle – the distance around the perimeter of a semicircle.
Radius of a Semicircle – the distance from the center of a circle to any point on its circumference.
Diameter of a Semicircle – the distance across a semicircle, passing through its center.
Cube
Volume of a Cube – representing the space contained within a cube.
Side of a Cube – the area contained within one side of a cube.
Surface Area of a Cube – the total area contained within all sides of a cube.
Perimeter of a Cube – the combined length of all the edges of a cube.
Interior Diagonal of a Cube – the line segment that connects opposite corners, representing the longest distance across the cube.
Face Diagonal of a Cube – the line segment that connects opposite corners of one side of a cube, representing the longest distance across that side.
Sphere
Volume of a Sphere – representing the space contained within a sphere.
Surface Area of a Sphere – the total area that covers a sphere.
Radius of a Sphere – the distance from the center of a sphere to any point on its surface.
Diameter of a Sphere – the distance across a sphere, passing through the center.
Circumference of a Sphere – the distance around the great circle (the largest possible circle that can be drawn on a sphere’s surface)
Cylinder
Height of a Cylinder – the distance between its the circular bases, representing the vertical measurement of a cylinder.
Radius of a Cylinder – the center of a cylinder’s circular base to its outer edge.
Volume of a Cylinder – representing the space contained within a cylinder.
Total Surface Area of a Cylinder – the total area that covers a cylinder.
Curved Surface Area of a Cylinder – measures the area of the side surface, excluding the top and bottom circular bases.