### Barometer Measuring Pressure of a Partially Evacuated Vessel

"The degree to which the air has been exhausted from a closed vessel in which there is a partial vacuum…

### Circle With Center o and Radius r with point P

Circle modeling the earth. O is the center of the earth, r the radius of the earth, and h the height…

### Segments of Circle and Arch

Illustration of circle with segments labeled and arch.

### Right Circular Cone With 2 ft. Height and 1 ft. Radius

An illustration of a right circular cone with la radius of 1 foot and a height of 2 feet. Illustration…

### Right Circular Cylinder

Right circular cylinder with diameter of 8 and height h.

### Right Circular Cylinder With 1 ft. Radius and 2 ft. height.

Right circular cylinder with a radius of 1 foot and a height/altitude of 2 feet.

### Construction Of Equilateral Triangle

Illustration used to show how to draw an equilateral triangle when given the altitude.

### Girl Measuring Heights of Children

An illustration of a girl measuring the heights of a boy and girl.

### Illumination of a Surface When the Surface is not Perpendicular to the Source

Illustration modeling the illumination on a surface when the surface is not perpendicular to hte rays…

### Kauri Pine

The Kauri Pine (Agathis australis) is a coniferous tree peculiar to New Zealand, and forming its most…

### Levelling

Leveling is an operation in which the object is to determine to difference of vertical height between…

### Measruing height

A man measuring the height of a boy against a wall.

### 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.

### Pentagon With Triangular Sections For Area

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

### Similar Decagonal Prisms

Illustration of 2 similar right decagonal prisms. Both have regular decagons for bases and rectangular…

### Similar Heptagonal/Septagonal Prisms

Illustration of 2 similar right heptagonal/septagonal prisms. Both have regular heptagons/septagons…

### Similar Hexagonal Prisms

Illustration of 2 similar right hexagonal prisms. The height of the prism and length of the side of…

### Similar Hexagonal Prisms

Illustration of 2 similar right hexagonal prisms. The height of the prism and length of the side of…

### Path of Projectile

Illustration modeling the path of a projectile.

### 2 Right Pentagonal Pyramids

Illustration of 2 right pentagonal pyramids with hidden edges shown. The pentagonal bases are congruent,…

### 2 Right Rectangular Pyramids

Illustration of 2 right rectangular pyramids with hidden edges shown. The rectangular bases are congruent,…

### Similar Pentagonal Pyramids

Illustration of 2 similar right pentagonal pyramids with hidden edges shown. The height of the pyramid…

### Rectangle With Dimensions

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

### 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.

### Using Proportions To Find Heights of Trees

Triangle diagram for measuring heights of trees using proportions.

### Using Proportions To Find Heights of Trees

Triangle diagram for measuring heights of trees using proportions

### Triangle With Height and Median

Triangle with height/altitude h and median m.

### Triangle ABC With Height h

Triangle ABC with sides a,b,c labeled and angles A,B,C labeled and h labeled as height.

### Triangle with Church

An illustration of a triangle comprised of a church and two lines. This illustration can be used to…

### Triangle with Lighthouse

An illustration of a three triangles created with boats and a lighthouse. This is an example illustration…

### Triangle with Tower

An illustration of a triangle comprised of a tower and two lines. This illustration can be used to determine…

### Triangle with Tree

An illustration of a triangle comprised of a tree and two lines. This is an example of a problem that…

### Acute Triangle

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

### 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.

### 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.

### Obtuse Triangle ABC With Height h

Triangle ABC with sides a,b,c labeled and angles A,B,C labeled and h labeled as height.

### Similar Triangles for Height of Smokestack

Illustration of similar triangles used to find height of smokestack.

### Similar Triangles With Altitudes Drawn

Illustration that shows two similar triangles with altitudes drawn.

### Water Level in Multiple Connected Vessels

"When any liquid is placed in one or more of several vessels communicating with each other, it will…