3rd Block Geometry

What

3rd Block Geometry

When

9/2/2022

Standards Addressed
MGSE.9-12.G.CO.10: Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180 degrees, base angles of isosceles triangles are congruent, the segment joining midpoints of two sides of a triangle is parallel to the 3rd side and half the length, medians of a triangle meet at a point.

Learning Targets /Success Criteria:
--I can identify linear pairs, adjacent angles, vertical angles, complementary angles and supplementary angles and provide a definition and/or example.
--I can apply properties of linear pair relationships and solve for missing variables or angles.
--I can classify triangles by their sides and angles.
--I can prove the measures of interior angles of a triangle sum to 180 degrees.
--I can use the Triangle Sum Theorem to find missing angles of a triangle.


Introduction/Connection (Bellringer): classifying triangles foldable

Direct Instruction/Guided Practice:
--Review bellringer
--Review classifying triangles using attached foldable.
--Guide students in Triangle Inequality Theorem foldable (attached below)
--Guide students in Angle Theorems for Triangles foldable.
--Finish Gallery Walk from Thursday
--If time, guided practice on select problems on Triangle Sum/Exterior angle theorem w/s (attached below).

Resources: DeltaMath

Assignment: DeltaMath assignment: Angle Addition Postulate & Special Angle Pairs