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Solve Problems Using Similar Triangles

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More Lessons for Grade 8
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Examples, solutions, videos, worksheets, stories, and lessons to help Grade 8 students learn about solving problems using similar triangles.

How to solve problems that involve similar triangles?
1. Sketch a diagram of the problem, identifying the similar triangles.
2. Set up the proportion.
3. Cross multiply.
4. Divide.

Word Problems with Similar Triangles and Proportions
Examples:
1. Two ladders are leaning against a wall at the same angle as shown. How long is the shorter ladder?
2. Campsites R and S are on opposite sides of a lake. A survey crew made the measurements shown on the diagram. What is the distance between the 2 campsites?
Similarity Word Problems
Use the properties of similar triangles to find the missing side lengths of triangles of a word problem.
Example:
Raul is 6 feet tall, and he notices that he casts a shadow that's 5 feet long. He then measures that the shadow cast by his scholl building is 30 feet long. How tall is the building?



Applying Similar Triangles part 1
Setup prove and solve similar triangles
Applying Similar Triangles part 2
Setup prove and solve similar triangles

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