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Geometry Proportions

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Numerous clipart illustrations that can be used when teaching the concept of proportionality. A proportion is an equation stating that two ratios are equal. Images are of similar figures, including those that can be used in application problems.


Ladders, 2 Leaning Against a Tree
Illustration of 2 ladders leaning against opposite sides of a palm tree to form similar right triangles. The angles of elevation from the ground to where the ladders meet the tree are congruent. Illu...
Ladders, 3 Leaning Against a Wall
Illustration of 3 ladders leaning against the side of a building (wall) to form right triangles. The distance from the base of the ladders to the wall is the same for all three ladders....
Lever and Fulcrum
Illustration of a lever with fulcrum F. W represents the weight lifted, P is the force that does the lifting, D is the distance from the fulcrum to the point of application of the force, and d is the...
Lever, Hammer Used as a
Illustration of a hammer being used as a lever. F represents the fulcrum. ...
Lever, Steel-yard Used as a
Illustration of an ordinary steel-yard being used as a lever. F represents the fulcrum. Weight P is used to balance weight W....
Lines, parallels cut by transversals
Illustration that shows if two parallel lines are cut by three or more transversals that pass through the same point, the corresponding segments are proportional....
Lines, parallels cut by transversals
Illustration that shows if two parallel lines are cut by three or more transversals that pass through the same point, the corresponding segments are proportional....
Measuring Tree Height
A man measuring the height of a tree by determining the angle and how far away he is standing....
Pentagons, Similar
Illustration of 2 similar pentagons....
Pentagons, Similar
Illustration of 2 similar pentagons....
Polygons, similar
Illustration that shows similar polygons (pentagons) that can be used to show proportionality....
Polygons, similar pentagons
Illustration that shows similar polygons (pentagons) that can be used to show proportionality....
Pressure, Hydraulic Machine Exerting
Illustration of a hydraulic machine. "A principle known as Pascal's Law states that pressure exerted on a liquid in a closed vessel is transmitted equally and undiminished in all directions." If a, ...
Proportions, angle bisector of triangle dividing opposite side
Illustration to show that an angle bisector of a triangle divides the opposite side into segments which are proportional to the adjacent sides....
Proportions, exterior angle bisector of triangle
Illustration to show that a bisector of a an exterior angle of a triangle divides the opposite side into segments which are proportional to the adjacent sides....
Proportions, parallel lines cut by parallels and nonparallels
Illustration to show that if parallel lines are cut by any number of parallels, the corresponding intercepts are proportional....
Proportions, triangle with lines drawn to form proportionate triangles
Illustration to show that if a line is drawn through two sides of a triangle parallel to the third side, it divides those sides proportionally....
Proportions, triangle with lines drawn to form proportionate triangles
Illustration to show that if a line divides two sides of a triangle proportionally, it is parallel to the third side....
Stepladder, Open
Illustration of a stepladder that is opened to form an isosceles triangle with the ground....
Tree, Palm Perpendicular to Ground
Illustration of a palm tree that is perpendicular to the ground. The tree is perfectly straight, as is the ground. This drawing could be used for shadow, proportion, trigonometric, or Pythagorean Th...
Trees, using proportions to find heights of
Triangle diagram for measuring heights of trees using proportions....
Trees, using proportions to find heights of
Triangle diagram for measuring heights of trees using proportions...
Triangle, inscribed in semicircle with mean proportional
Right triangle inscribed in semicircle. Illustration shows that the perpendicular from any point in the circumference to the diameter of a circle is the mean proportional between the segments of the ...
Triangles, similar
Illustration that shows two mutually equiangular triangles are similar....
Triangles, similar
Illustration that shows that two triangles which have their sides respectively parallel, or respectively perpendicular, are similar....
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