Geometric Justifications

Today's notes introduce the students to many of the reasons that we will use to justify our steps in a geometric problem. We discussed several properties of equality, the Segment and Angle Addition Postulates, and the Reflextive, Symmetric, and Transitive Properties of Congruence.

Students will use these statements as reasons to justify their steps throughout this unit.

Homework: Page 219, #1 - 8; Page 221, #1 - 8

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Last of the Triangle Inequalities

Tuesday's notes started with a review of the Triangle Exterior Angle Inequality theorem:

From there, we discussed that the measure of an exterior angle must always be greater than the measure of either non-adjacent interior angle. The students made this conclusion because it takes both added together to make an equivalent amount to the exterior angle.

Homework: Worksheet "Triangle Sums". This worksheet is review of concepts taught earlier in this unit.

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