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224 resources with the concept similar figures

4:01
Lesson Planet

Similar Solids: Lesson

For Students 6th - 11th
Blow up a solid by a scale factor. A section of a larger playlist on basic geometry introduces the ratios of the surface areas and volumes of similar solids. Using the ratios, the video works several examples involving similar figures.
3:26
Lesson Planet

Area and Perimeter of Similar Polygons: Lesson

For Students 7th - 11th
Find the square of the scale factor. A component of a large playlist on geometry discusses the ratios of the perimeters and areas of two similar polygons. The resource shows examples in finding the ratios that lead to a pattern.
3:15
Lesson Planet

Similar Polygons and Scale Factors: Lesson

For Students 7th - 11th Standards
Develop an understanding of the scale of similarity. Starting with the concept of congruency, the resource introduces the idea of similarity between two figures. As part of a larger playlist on geometry, it defines similarity and uses...
4:36
Lesson Planet

Self Similarity: Lesson

For Students 8th - 11th
Zoom in to reveal more of the same. The resource introduces the concept of self similarity. Using a simple example, the video—part of a larger playlist covering geometry concepts—illustrates the meaning of a self similarity figure.
4:14
Lesson Planet

Dilation in the Coordinate Plane: Lesson

For Students 8th - 11th Standards
Multiply coordinates to either shrink or enlarge a figure. An informative segment of a geometry playlist introduces dilation on the coordinate plane. The dilations in the resource use the origin as the center of dilation, which makes...
Lesson Planet

How Does Scale Factor Affect the Areas and Perimeters of Similar Figures

For Teachers 9th - 12th Standards
Are all the measurements scalable? Pupils work in groups or alone to determine whether figures are similar and find any missing side lengths. Then, they calculate the perimeters and areas of the figures. Finally, using the measurements,...
Lesson Planet

How Do You Measure the Immeasurable?

For Teachers 9th - 12th Standards
How do you measure a distance where the measurement tool will not reach? Pupils use the concept of similar triangles to perform indirect measurements. The lesson asks teachers to demonstrate the method and lead the class through a set of...
Lesson Planet

Dilation Transformation

For Teachers 7th - 12th Standards
Just how similar are dilations to isometries? The instructional activity builds upon pupils' knowledge of transformations and introduces the concept of dilations to obtain similar figures. Learners find out how to dilate a figure without...
Lesson Planet

Circle to Circle

For Students 9th - 12th Standards
What does every circle have in common? Learners explore this question as they prove all circles are similar. A series of activities leads them to this conclusion by identifying transformations.
Lesson Planet

Are All Circles Similar?

For Teachers 9th - 11th Standards
Dilated pupils, the way to prove circles are similar. Using the knowledge of dilations of polygons, class members learn how to dilate a circle to show that it is similar to any other circle. The teacher guides the class through a proof...
Lesson Planet

Showing Similarity

For Students 9th - 12th Standards
Show similarity with a similar approach to congruence. The assessment provides learners with two figures on a coordinate plane. Pupils use the coordinates of the figures and similarity transformations to describe how to show the two...
Lesson Planet

Similar Circles

For Students 9th - 12th Standards
Develop a proof of the general case. Pupils develop a proof using transformations to prove the general case that any two circles are similar. The assessment provides minimum information about the two circles.
Lesson Planet

Area and Circumference 2

For Students 9th - 12th Standards
Use scale factors to find areas of circles. Pupils delve deeper into the informal argument for the formula of the area of a circle. The scholars show the relationships of areas of similar polygons also holds true for circles.
Lesson Planet

Dilation of a Line: Factor of One Half

For Students 9th - 12th Standards
What happens to a dilation when the scale factor is less than one? Learners show and then tell this in a short worksheet. They create a dilation from an off-line point using a scale factor of 0.5. The class then explains how the images...
Lesson Planet

Dilation of a Line: Center on the Line

For Students 9th - 12th Standards
Assessing progress is easy using a quick quiz focused on dilations with the center on the line! Geometry geniuses graph the images of points resulting from a dilation with a center point. Then, they must describe the relationship between...
Lesson Planet

Dilation of a Line Segment

For Students 9th - 12th Standards
It's a dilation sensation! Have your young mathematicians show what they know using a short, simple formative check about the dilation of a line segment. Geometry scholars try their hand at constructing a dilation, then must describe how...
Lesson Planet

Similar Figures

For Teachers 7th
How similar do figures have to be to be similar figures? Individuals learn to identify similar figures by verifying that angles are congruent and sides are proportional. Additionally, they match the corresponding parts of similar figures.
Lesson Planet

Similar Triangles

For Teachers 9th - 11th Standards
Pupils work in pairs to investigate what it takes to prove that two triangles are similar. They work through various shortcuts to find which are enough to show a similarity relationship between the triangles. Small groups work with the...
Lesson Planet

Enlargements

For Students 8th - 11th Standards
Make enlargements with and without centers. Pupils work through seven problems dealing with dilations or enlargements. The first couple items are strict enlargements without centers, while the others have centers. Class members also...
1 In 1 Collection
EngageNY

Similarity

For Teachers 8th Standards
Use the coordinate plane to show two figures are similar. The lesson incorporates congruence transformations and dilations to move a figure on to another figure. Pupils determine that if a similarity transformation exists between two...
1 In 1 Collection
EngageNY

End-of-Module Assessment Task - Grade 8 Mathematics (Module 3)

For Students 8th Standards
Everything the class knows about similarity in one small package. The last portion of a 16-part series is a three-question assessment. In it, pupils demonstrate their application of similar figures and their associated transformations. 
Lesson Planet

Square and Circle

For Students 9th - 12th Standards
To determine the dimensional change to quadruple the area, class members determine how to increase the dimensions of a square and a circle to increase the perimeter by a given factor. they then calculate the necessary factor to create...
1 In 1 Collection
EngageNY

Basic Properties of Similarity

For Teachers 8th Standards
Does the symmetry and transitive property apply to similarity? The 10th segment in a series of 16 presents the class with a group of explorations. The explorations have pairs show that similarity is both symmetrical and transitive. It...
1 In 1 Collection
EngageNY

What Lies Behind “Same Shape”?

For Teachers 8th Standards
Develop a more precise definition of similar. The lesson begins with an informal definition of similar figures and develops the need to be more precise. The class learns about dilations and uses that knowledge to arrive at a mathematical...