Public learning track
Dilations, Homothety, and Triangle Similarity
8th Grade · Math · Open Global Math
11 lessons
Goal
Analyze dilations on and off the coordinate plane, establish triangle similarity criteria (AA, SAS, SSS), and apply Thales' intercept theorem.
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Dilations and Scale Factors from the Origin
11 lessons
0 of 11 done
- 1Dilations and Scale Factors from the OriginUp nextStart
- 2Dilations with Centers Not at the OriginPremiumNot started yet
- 3Finding Scale Factor from Figures on a Coordinate PlaneNot started yet
- 4Similarity Ratios and Scale FactorsNot started yet
- 5Similarity as a Composition of Rigid Motions and DilationsNot started yet
- 6Angle-Angle (AA) Triangle Similarity CriterionNot started yet
- 7Side-Angle-Side (SAS) and Side-Side-Side (SSS) Triangle Similarity CriteriaNot started yet
- 8Thales' Theorem and the Triangle Proportionality TheoremNot started yet
- 9Using Similarity in Right Triangles: Geometric MeanNot started yet
- 10Solving Proportions in Overlapping and Nested Similar TrianglesNot started yet
- 11Applications of Triangle Similarity in Indirect MeasurementNot started yet
Curriculum Framework
8th Grade · Math · Open Global Math
1
9 lessons
Rigid Transformations and Coordinate Mappings
Verify, represent algebraically, and apply translations, reflections, and rotations on the coordinate plane while proving preservation of length, angle measure, and parallelism.
2
11 lessons
Dilations, Homothety, and Triangle Similarity
Analyze dilations on and off the coordinate plane, establish triangle similarity criteria (AA, SAS, SSS), and apply Thales' intercept theorem.
3
12 lessons
Right Triangle Trigonometry and Applications
Define and evaluate acute right-triangle trigonometric ratios, recall exact values for special angles, and solve right triangles in applied contexts.
4
8 lessons
3D Spatial Projections, Multi-View Drawings, and Geometric Nets
Analyze 3D projections, sketch three-view drawings (front, top, side), and construct accurate models from geometric nets of prisms, cylinders, and cones.