# 912Geometry_SRT_SpecialRightTriangles_ExitSlip_Construct_PythagoreanTheoremandSpecialRightTrianglesExitSlip

This task was used as an exit slip for our special right triangles unit. The overall objective was for students to be able to label side lengths in special right triangles and articulate how they know the lengths. Students struggled defending their answers for the side lengths since they talked about how they were using their special right rules so “it has to be true”.

# 912Geometry_SRT_SpecialRightTriangles_Worksheet_ConstructCritique_30-60-90Go!

This task is designed for geometry students developing skills with special triangles, specifically 30-60-90. Students are asked to critique student work that finds the length of the triangle’s hypotenuse and construct an argument either agreeing or disagreeing with the student work. The student work addresses a common error that students make when finding the hypotenuse of a 30-60-90 triangle. Students use the length of the shorter leg and double it in order to find the hypotenuse, but this student uses the wrong leg in his calculations.

Microsoft Word version: 912Geometry_SRT_SpecialRightTriangles_Worksheet_ConstructCritique_30-60-90Go

# 912Geometry_SRT_SpecialRightTriangles_Warmup_Construct_SpecialRightTrianglesWarmup

This warm up is created for geometry students studying special right triangles. In two examples, students are given a side length and an angle measurement and must find the other two side lengths. Students are to construct an argument defending one of their side lengths in the final problem.

Microsoft Word version: 912Geometry_SRT_SpecialRightTriangles_Warmup_Construct_SpecialRightTrianglesWarmup_1

# 912Geometry_SRT_SpecialRightTriangles_Worksheet_Construct_SpecialRightTriangles

This task is designed for geometry students with a strong knowledge of special right triangles. Students are given a large triangle that is split into two triangles and are asked to determine different side lengths given just one side length and three angles. Students must recognize missing angles and identify the special triangles, while also knowing the proportions of the side lengths. The task asks for a mathematical argument that convinces others of the answer.

Microsoft Word version: 912Geometry_SRT_SpecialRightTriangles_Worksheet_Construct_SpecialRightTriangles

# 912Geometry_SRT_SpecialRightTriangles_Warmup_Construct_SpecialRightTrianglesWarmup

This warm up is created for geometry students studying special right triangles. In two examples, students are given a side length and an angle measurement and must find the other two side lengths. Students are to construct an argument defending one of their side lengths in the final problem.

Microsoft Word version: 912Geometry_SRT_SpecialRightTriangles_Warmup_Construct_SpecialRightTrianglesWarmup

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# 912Geometry_SRT_SimilarTriangles_Warmup_Construct_SimilarityWarmup

This similarity warmup has geometry students focus on the definition of similar triangles and has students engage in one practice problem. Students are asked to fill in the blanks providing definitions for similar triangles, focusing on congruent angles and proportional side lengths. Students must construct an argument telling why two triangles are or are not similar.

Microsoft Word version: 912Geometry_SRT_SimilarTriangles_Warmup_Construct_SimilarityWarmup

# 912Geometry_SRT_SimilarTriangles_ExitSlip_Construct_SimilarityExitSlip

This exit slip is for geometry students learning similarity. Two similar triangles are given and students must find the missing side lengths and scale factor. The final question uses argumentation language and asks students to construct an argument justifying the process of how one the side lengths was found.

Microsoft Word version: 912Geometry_SRT_SimilarTriangles_ExitSlip_Construct_SimilarityExitSlip

# 912Geometry_SRT_SimilarTriangles_Warmup_Construct_SimilarityandDilationsWarmup

Similarity and Dilations Warmup is geared towards geometry students. The task provides two triangles on a coordinate plane and asks students to determine if the triangles are similar and construct an argument that supports the answer. The task does not provide measurements of the sides of the triangle and requires students to be able to read the coordinate plane as well as identify similar triangles.

Microsoft Word version: 912Geometry_SRT_SimilarTriangles_Warmup_Construct_SimilarityandDilationsWarmup

# 912Geometry_SRT_PythagoreanTheorem_Warmup_Construct_PythagoreanTheoremWarmup

This warm up is designed for geometry students learning the Pythagorean Theorem. The first two problems contain a triangle with a missing side length that students need to solve for. The third question asks students to use argumentation language to construct a justification for one of their answers. An answer key is provided, with key pieces of information that should be included in the argument.

Microsoft Word version: 912Geometry_SRT_PythagoreanTheorem_Warmup_Construct_PythagoreanTheoremWarmup