# Q3, W4: February 16th – 19th Advanced Math Teacher Felicia Taylor Advanced Math 7th 22 Focus 6: Angles
Standard(s) Taught

#### Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.

Learning Targets and Learning Criteria

Students are successful when they can…

• draw geometric shapes with given conditions.
• construct triangles from three measures of angles or sides.
• describe when angle measures determine a triangle (given angles equal 180)
• describe when side measures determine a unique triangle (a + b > c) or (a + b c).
• determine whether three angle measures of three side lengths can form a triangle.
• discover the definitions of supplementary, complementary, vertical, and adjacent angles.
• solve multi-step problems by applying what you know about the types of angles.
• informally prove the angle-sum theorem, the properties of angles when parallel lines are cut by a transversal and the angle-angle criterion for similar triangles.
• prove that the sum of any triangle’s interior angles will have the same measure as a straight angle.
• make conjectures regarding the relationships and measurements of the angles created when two parallel lines are cut by a transversal.
• apply proven relationships to establish minimal properties to justify similarity.
• present informal arguments as to whether or not triangles are similar based on Angle-Angle criterion.
Classroom Activities

Monday – Presidents’ Day

No School

Tuesday (5th Period Students)

1. Instruction – Triangle Angle Sum
2. Assignments – due Friday, February 19th
1. IXL 8th Grade O.7 Find missing angles in triangles
2. IXL 8th Grade O.8 Find missing angles in triangles using ratios
3. IXL 8th Grade O.9 Triangle Angle Sum Theorem

Wednesday (Innovative and 3rd Period Students)

1. Instruction – Angles, The Complete Middle School Study Guide, pages 267-277
2. Assignment – IXLs due Thursday, February 18th
1. 7th Grade W.16 Identify complementary, supplementary, vertical and adjacent angles
2. 7th Grade W.17 Find the measures of complementary, supplementary, vertical and adjacent angles

Wednesday (5th Period Students)

1. Instruction – Exterior Angle Theorem
2. Assignment – IXL 8th Grade O.12 Exterior Angle Theorem – due Friday, February 19th

Thursday (Innovative and 3rd Period Students)

1. Instruction – Triangles, The Complete Middle School Study Guide, pages 287-289, 337-344
2. Assignments – due Monday, February 22nd
1. IXL 7th Grade W.4 Triangle Inequality
2. IXL 7th Grade W.8 Graph triangles and quadrilaterals
3. Instruction – Triangle Sum
4. Assignments – due Monday, February 22nd
1. IXL 8th Grade O.7 Find missing angles in triangles
2. IXL 8th Grade O.8 Find missing angles in triangles using ratios

Friday (5th Period Students)

1. Instruction
1. Alternate Interior and Alternate Exterior Angles
2. Transversals of Parallel Lines
2. Assignments – due Tuesday, February 23rd
1. IXL 8th Grade O.16 Identify alternate interior and alternate exterior angles
2. IXL 8th Grade O.17 Transversals of parallel lines: name angle pairs
3. IXL 8th Grade O.18 Transversals of parallel lines: find angle measures
Assignments Due

Summatives

None

Formatives

Tuesday, February 16th (5th Period Students)

1. IXL 7th Grade W.4 Triangle inequality
2. IXL 7th Grade W.8 Graph triangles and quadrilaterals
3. IXL 7th Grade W.16 Identify complementary, supplementary, vertical and adjacent angles
4. IXL 7th Grade W.17 Find the measures of complementary, vertical and adjacent angles

Thursday, February 18th (Innovative and 3rd Period Students)

1. 7th Grade W.16 Identify complementary, supplementary, vertical and adjacent angles
2. 7th Grade W.17 Find the measures of complementary, supplementary, vertical and adjacent angles

Friday, February 19th (5th Period Students)

1. IXL 8th Grade O.7 Find missing angles in triangles
2. IXL 8th Grade O.8 Find missing angles in triangles using ratios
3. IXL 8th Grade O.9 Triangle Angle Sum Theorem
4. IXL 8th Grade O.12 Exterior Angle Theorem
Additional Resources

All IEP accommodations will be provided each class.

All notes will be uploaded into Focus (GradeBook).