Q2, W8: December 9th – 13th

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Teacher Felicia Taylor Intensive Math 8th 17 Focus 6: Transformations; Focus 7: Angle-Pair Relationships
Standard(s) Taught

MAFS.8.G.1.3

Describe the effect of dilations, translations, rotations, and reflections on two-dimensional figures using coordinates.

MAFS.8.G.1.4

Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.

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 angle-angle criterion for similarity of triangles.

Learning Targets and Learning Criteria

Students are successful when they can:

• describe the changes occurring to x- and y- coordinates of a figure after a translation, reflection, rotation, or dilation.
• reason that a 2-D figure is congruent to another if the second can be obtained by a sequence of rotations, reflections, translations.
• describe a sequence of rigid motions to map one figure onto another.
• explain how transformations can be used to prove that two figures are similar.
• describe a sequence of transformations to prove or disprove that two given figures are similar.
• know the definition of similar and why dilation alone is not enough to determine similarity.
• apply proven relationships to establish minimal properties to justify similarity.
• make conjectures regarding the relationships and measurements of the angles created when two parallel lines are cut by a transversal.
Classroom Activities

Monday (1st & 4th Period) /Tuesday (7th Period)

1. Instruction – Complementary, Vertical and Adjacent Angles
2. IXLs – Dilations
1. 8-Q.1 – Similar and congruent figures
2. 8-Q.2 – Dilations: graph the image
3. 8-Q.3 – Dilations: find the coordinates
3. IXL – Complementary, Supplementary, Vertical and Adjacent Angles
1. 8-O.14 Find the measures of complementary, vertical, and adjacent angles

Wednesday (1st, 4th & 7th Periods) Early Release Day (40 minute class)

1. Instruction – Angle-Pair Relationships
2. IXLs – Angle-Pair Relationships
1. 8-O.16 – Transversals of parallel lines: name angle pairs
2. 8-O.17 – Transversals of parallel lines: find angle measures

Thursday (1st & 4th Periods) /Friday (7th Period)

1. DIA Review
2. Instruction – Exterior Angle Theorem
3. IXLs – Triangle Angles
1. 8-O.7 Find missing angles in triangles
2. 8-O.11 Exterior Angle Theorem
Assignments Due

Summative

None

Formative

IXLs

1. 8-Q.1 – Similar and congruent figures
2. 8-Q.2 – Dilations: graph the image
3. 8-Q.3 – Dilations: find the coordinates
4. 8-O.14 Find the measures of complementary, vertical, and adjacent angles
5. 8-O.16 – Transversals of parallel lines: name angle pairs
6. 8-O.17 – Transversals of parallel lines: find angle measures
7. 8-O.7 Find missing angles in triangles
8. 8-O.11 Exterior Angle Theorem