Similarity and Congruence
Young scholars determine that two figures are similar or congruent by investigating figures that are similar and figures that are congruent. They prove that two figures are similar or congruent by using definitions, postulates, and theorems.
9th - 12th Math 15 Views 64 Downloads
Criteria for Triangle Congruence
This is an excellent lesson plan for exploring the criteria for triangle congruence and teaching to the Common Core. After a review of the definition of congruent triangles, students work in small groups to rotate through six stations....
9th - 12th Math CCSS: Designed
New Review Ratios and Proportions with Congruent and Similar Polygons
Investigate how similar and congruent figures compare. Learners understand congruent figures have congruent sides and angles, but similar figures only have congruent angles — their sides are proportional. After learning the...
8th - 11th Math CCSS: Adaptable
New Review Geometry: Transformations, Congruence, and Similarity
Rigid motions are to congruence as what are to similarity? Investigate properties of rigid motions and define congruence in terms of rigid motions with the ninth chapter of a 10-part eighth grade workbook series. The lesson then prompts...
7th - 10th Math CCSS: Designed
The Angle-Angle (AA) Criterion for Two Triangles to Be Similar
What do you need to prove triangles are similar? Learners answer this question through a construction exploration. Once they establish the criteria, they use the congruence and proportionality properties of similar objects to find...
9th - 10th Math CCSS: Designed