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# CCSS.Math.Content.8.G.A.4 - Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.

Authors: National Governors Association Center for Best Practices, Council of Chief State School Officers

Title: CCSS.Math.Content.8.G.A.4 Understand That A Two-dimensional Figure Is Similar To Another If... Geometry - 8th Grade Mathematics Common Core State Standards

Publisher: National Governors Association Center for Best Practices, Council of Chief State School Officers, Washington D.C.

(Page last edited 10/08/2017)

1. - This eleven page lesson plan provides clear instructions on how to perform the measurement and gives several practice problems
2. Building Height - Lesson plan from Illuminations [includes a good illustration]
3. Connecting Geometry: Similar Triangles - Similar triangles can be very useful for measuring inaccessible objects. One method of doing this is called "shadow reckoning," which this page describes
4. Exploration: Indirect Measurement - This five-page lesson provides suggestions for a technology lab, a review for mastery page and a homework page with eight problems
5. Extending Our Senses: Indirect Measurement - This newsletter article from Arbor Scientific includes ideas on how to measure the height of a flagpole or rocket and even a suggestion for measuring the size of the moon
6. Find the Altitude of a Flying Kite - Using a clinograph [instructions included on how to make a clinograph]
7. How to Measure Chimney Height - Ignore the one about the barometer (that's just a joke), the suggestions in yellow are good.
8. Indirect Measurement - A good example of how to use this method from iCoach Math
9. Indirect Measurement - This 4-page document was designed for 4th grade but it fits this standard perfectly
10. Indirect Measurement with Similar Triangles - This five page lesson plan describes how to use a mirror in making indirect measurements.
11. Indirect Measuring and Shadow Reckoning - Three examples with fully worked out solutions to be used as examples
12. Mathematical Movements (Flips, Slides and Turns) - A 25 page lesson with printables
13. Measurement Estimation - Instructions from an outdoor skills handbook for scouts
14. Measuring Heights of Tall Objects - This page has six problems for students to solve, solutions are available. At the end of the page there is a link to a video segment about this skill
15. Measuring Heights of Tall Objects: Homework - Eight homework problems with solutions available
16. Measuring the Height of a Building Using Shadows - Explanation from Dr. Math at the Math Forum
17. Measuring Turns - What would shapes look like if rotated
18. Sam's Similar Shapes - Students learn about shapes that are different sizes but the same shape.
19. Similar Triangles and Indirect Measurement - This worksheet gives a short review, an example and five practice problems
20. Spy Guys Interactive - Slides and Flips - Lesson 17
21. Transformations - How to identify, describe, perform, and analyze transformations involving translations, reflections, and rotations
22. Transformations and Symmetry - Many good examples on this Math Art Connections page includes a student project assignment at the end
23. Wrapping Paper Patterns - Decide which figures would result from a flip, a slide, or a turn

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