Standard(s) Taught 

MAFS.7.G.1.2
Draw (freehand, with ruler and protractor, and with technology) geometric shapes with given conditions. Focus on constructing triangles from three measures of angles or sides, noticing when the conditions determine a unique triangle, more than one triangle, or no triangle.
MAFS.7.G.2.5
Use facts about supplementary, complementary, vertical, and adjacent angles in a multistep problem to write and solve simple equations for an unknown angle in a figure.
MAFS.8.G.1.5
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 angleangle 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 multistep problems by applying what you know about the types of angles.
 informally prove the anglesum theorem, the properties of angles when parallel lines are cut by a transversal and the angleangle 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 AngleAngle criterion.

Classroom Activities 

Monday – Presidents’ Day
No School
Tuesday (5th Period Students)
 Instruction – Triangle Angle Sum
 Assignments – due Friday, February 19th
 IXL 8th Grade O.7 Find missing angles in triangles
 IXL 8th Grade O.8 Find missing angles in triangles using ratios
 IXL 8th Grade O.9 Triangle Angle Sum Theorem
Wednesday (Innovative and 3rd Period Students)
 Instruction – Angles, The Complete Middle School Study Guide, pages 267277
 Assignment – IXLs due Thursday, February 18th
 7th Grade W.16 Identify complementary, supplementary, vertical and adjacent angles
 7th Grade W.17 Find the measures of complementary, supplementary, vertical and adjacent angles
Wednesday (5th Period Students)
 Instruction – Exterior Angle Theorem
 Assignment – IXL 8th Grade O.12 Exterior Angle Theorem – due Friday, February 19th
Thursday (Innovative and 3rd Period Students)
 Instruction – Triangles, The Complete Middle School Study Guide, pages 287289, 337344
 Assignments – due Monday, February 22nd
 IXL 7th Grade W.4 Triangle Inequality
 IXL 7th Grade W.8 Graph triangles and quadrilaterals
 Instruction – Triangle Sum
 Assignments – due Monday, February 22nd
 IXL 8th Grade O.7 Find missing angles in triangles
 IXL 8th Grade O.8 Find missing angles in triangles using ratios
Friday (5th Period Students)
 Instruction
 Alternate Interior and Alternate Exterior Angles
 Transversals of Parallel Lines
 Assignments – due Tuesday, February 23rd
 IXL 8th Grade O.16 Identify alternate interior and alternate exterior angles
 IXL 8th Grade O.17 Transversals of parallel lines: name angle pairs
 IXL 8th Grade O.18 Transversals of parallel lines: find angle measures

Assignments Due 

Summatives
None
Formatives
Tuesday, February 16th (5th Period Students)
 IXL 7th Grade W.4 Triangle inequality
 IXL 7th Grade W.8 Graph triangles and quadrilaterals
 IXL 7th Grade W.16 Identify complementary, supplementary, vertical and adjacent angles
 IXL 7th Grade W.17 Find the measures of complementary, vertical and adjacent angles
Thursday, February 18th (Innovative and 3rd Period Students)
 7th Grade W.16 Identify complementary, supplementary, vertical and adjacent angles
 7th Grade W.17 Find the measures of complementary, supplementary, vertical and adjacent angles
Friday, February 19th (5th Period Students)
 IXL 8th Grade O.7 Find missing angles in triangles
 IXL 8th Grade O.8 Find missing angles in triangles using ratios
 IXL 8th Grade O.9 Triangle Angle Sum Theorem
 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).
