Curriculum

#### Description:

Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180?; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.Exercises from Illustrative MathematicsA set of exercises, commentary, and solutions. For this unit, choose:G-CO Midpoints of Triangle SidesG-CO Congruent angles in isosceles trianglesG-CO Sum of angles in a triangle

#### Subjects:

• Mathematics > General
• Mathematics > Geometry

#### Keywords:

theorems triangles isosceles median mid-point

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Update Standards?

#### CCSS.Math.Practice.MP2: Common Core State Standards for Mathematics

Reason abstractly and quantitatively.

#### CCSS.Math.Practice.MP3: Common Core State Standards for Mathematics

Construct viable arguments and critique the reasoning of others.

#### CCSS.Math.Practice.MP5: Common Core State Standards for Mathematics

Use appropriate tools strategically.

#### CCSS.Math.Practice.MP6: Common Core State Standards for Mathematics

Attend to precision.

#### CCSS.Math.Practice.MP7: Common Core State Standards for Mathematics

Look for and make use of structure.