# Q2, W2: October 25-29 Geometry

Teacher Kristin Andreason Geometry Honors 8 October 25-29 Unit Two (B): Congruence of Proofs with Triangle Properties
Standard(s) Taught

problems. Theorems include:  measures of interior angles of a triangle sum to 180°; triangle inequality theorem; 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.

Learning Targets and Learning Criteria
• classify triangles by sides and angles.
• solve problems using definitions, theorems, postulates, about triangles, including:
a) Measures of interior angles of a triangle sum to 180°;
b) Base angles of isosceles triangles are congruent.
c) An exterior angle of a triangle is equal to the sum of the measures of the remote
interior angles.
d) Hinge Theorem.
e) Midsegment Theorem
f) The medians of a triangle meet at a point (centroid).
g) The angle bisectors of a triangle meet at a point (incenter).
h) The perpendicular bisectors of a triangle meet at a point (circumcenter).
Classroom Activities

Monday/Tuesday:

1. Students will take notes in their ISN on Classifying Triangles
2. Students will take notes in the ISN on Angle Theorems
3. We will look at IXL F.3 together
4. Students will do IXL F.2 and the worksheet on Exterior Angle Theorem

Wednesday:

• We will go on the Geogebra website to learn about rotational symmetry of regular polygons
• Students will take notes on rotational symmetry
• Students will do IXL O.2

Thursday/Friday

1. Students will discover the Triangle Inequality Theorem using the Geogebra website
2. Students will take notes on Triangle Inequality Theorem
3. Students will do IXL M.5
Assignments Due
• IXL F.2
• Exterior Angle Theorem worksheet
• IXL M.5