### Composite Figure of Quadrilateral Frustum With Half of a Cylinder Attached

An illustration of a composite figure made up of a quadrilateral frustum and half of a cylinder. Frustum…

### Circular Cone

An illustration of a circular cone.

### Right Circular Cone

An illustration of a right circular cone with labels on slant height and altitude.

### Volume of Cone

Illustration of a cone with a polygon inscribed used to show that the volume of a circular cone is equal…

### Measures of Form

Labeled shapes showing various measures of form.

### Altitude and Diagonal of a Parallelogram

Illustration of a parallelogram with altitude and diagonal drawn.

### Area of a Parallelogram

Illustration of parallelogram AEFC drawn two different ways with base b and altitude/height a used to…

### Parallelogram With Dimensions

Parallelogram with dimensions labeled. Parallelogram can be used to calculate area.

### Parallelogram With Dimensions

Parallelogram with dimensions labeled. Parallelogram can be used to calculate area.

### Parallelogram and Rectangle Relationship

Parallelogram with dimensions drawn to show relationship to the area of a rectangle.

### Volume of Parallelopiped

Diagram used to prove the theorem: "The volume of a any parallelopiped is equal to the product of its…

### Pentagon With Triangular Sections For Area

Pentagon with dimensions labeled. Pentagon can be used to calculate area by calculating individual triangles…

### Volume of Prismatoid

Diagram used to prove the theorem: "The volume of a prismatoid is equal to the product of one-sixth…

### Pyramid Frustum With Hexagonal Bases and 6 inch and 10 inch Sides

An illustration of a pyramid with the top cut off by a plane parallel to the base. The remaining part…

### Pyramid Frustum With Triangular Bases and Height of 27 inches

An illustration of a pyramid with the top cut off by a plane parallel to the base. The remaining part…

### Pyramid Frustum With Triangular Bases and Height of 27 inches

An illustration of a pyramid with the top cut off by a plane parallel to the base. The remaining part…

### Pyramid With Hexagonal Base

An illustration of a pyramid with a hexagonal base.

### Pentagonal Pyramid For Volume

Illustration of pentagonal pyramid used to show that the volume is equal to one third of the product…

### Regular Pyramid With Square Base

An illustration of a regular pyramid with a square base and labels on lateral edge, slant height, altitude,…

### Pyramid With Triangular Base

An illustration of a pyramid with a triangular base.

### Triangular Pyramid For Volume

Illustration of triangular pyramid used to show that the volume is equal to one third of the product…

### Right Triangle Inscribed In A Semicircle

An illustration of a right triangle inscribed in a semicircle.

### Trapezoid

Trapezoid with angles and height labeled.

### Area of a Trapezoid

Illustration of a trapezoid with altitude a and bases b and b' used to demonstrate that the area is…

### Trapezoid With Dimensions

Trapezoid with dimensions labeled. Trapezoid can be used to calculate area.

### Triangle With Height and Median

Triangle with height/altitude h and median m.

### Acute Triangle

An illustration of an acute triangle with the height/altitude labeled h.

### Triangle With Altitude and Isosceles Triangles Within

Illustration showing a triangle with an altitude CD passing through the middle of EF. Triangles AEC…

### Altitudes Drawn from Base Angles of Isosceles Triangles

Illustration to show altitudes drawn from base angles of an isosceles triangle.

### Altitudes In A Triangle

Illustration used to show "The altitudes of a triangle are concurrent."

### Area of Triangle

Parallelogram illustration to show where the area of a triangle formula comes from.

### Area of a Triangle

Illustration of triangle ABC with altitude a and base b to be used to demonstrate that the area is 1/2ba.

### Triangle With Dimensions

Triangle with dimensions labeled. Triangle can be used to calculate area.

### Triangle With Dimensions

Triangle with dimensions labeled. Triangle can be used to calculate area.

### Equilateral Triangle

Sketch of equilateral triangle with bisectors, medians, and altitudes.

### Obtuse Triangle

Obtuse triangle with altitude drawn.

### Obtuse Triangle

Obtuse triangle with altitude and one median drawn.

### Obtuse Triangle With Height Drawn

Triangle with sides a,b,c and height/altitude h.

### Obtuse Triangle

An illustration of an obtuse triangle with the height/altitude labeled h.

### Orthocenter of Triangle

Illustration to show altitudes in a triangle. It is known as the orthocenter.

### Parts Of A Triangle

Illustration used to show the various parts of a triangle: sides, angles, medians, altitudes, bisectors,…

### Perpendiculars Dropped Any Point in the Equilateral Triangle

Illustration to show the perpendiculars dropped from any point in the equilateral triangle to the three…

### Right Triangle

Right triangle with square

### 3 Isosceles Triangles Wit Equal Bases

Illustration of three isosceles triangles with the same base AC but varying heights (as B gets farther…

### Similar Triangles With Altitudes Drawn

Illustration that shows two similar triangles with altitudes drawn.

### Volume of Triangular Prism

Diagram used to prove the theorem: "The volume of a triangular prism is equal to the product of its…

### Volume of Triangular Pyramid

Diagram used to prove the theorem: "The volume of a triangular pyramid is equal to one third of a triangular…

### Equivalent Triangular Pyramids

Diagram used to prove the theorem: "Two triangular pyramids having equivalent bases and equal altitudes…