Math Algebra, Geometry, Trig, Calculus & Higher Level Thinking
Find free, ready-to-teach resources aligned to 8.G.A.5. Designed for the Common Core Mathematics set index.
8.G.A.5 | Algebra, Geometry, Trig, Calculus & Higher Level Thinking
Grade 8
Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. *For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so*.
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The Science of Craft: Building New Materials with Old Techniques
STEM is older and more expansive than you might imagine. Crafted materials, like knit sweaters and woven baskets, were our ancestors’ solutions to everyday problems. In this lesson, we learn the geometry and physics of traditional crafts, and explore how these technologies help us engineer new solutions for the future!
Alignment summary( Connected)
Lesson 2
Students recognize that regular polygons whose interior angles are factors of 360 can be tiled in flat, gap-free patterns.
Included resources
3 lessons and 5 supporting media items.
Lesson 2
Supporting videos
