3, Lesson 8, Unit 7, Grade 7, OpenUp icon
Instructional Activity

2 Sides and 1 Angle

Lesson 8. Unit 7. Grade 7 Open Up Resources

Open Up Resources15 min(s)

This Instructional Activity is a part of the Lesson 8, Unit 7, Grade 7. In this activity, students examine different orientations of triangles that all share 2 sides lengths and one angle measure. They recognize that some of these triangles are identical copies and others are different triangles (not identical copies). In the coming lessons, students are asked to draw their own triangles. On their own, students often have trouble thinking about triangles where the three given conditions are not included adjacent to one another. For example, when given two sides and an angle, many students will immediately think of putting the given angle between the two sides, but struggle with visualizing putting the angle anywhere else.

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