Geometry 9-2 Complete Lesson: Reflections

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A complete formative lesson with embedded slideshow, mini lecture screencasts, checks for understanding, practice items, mixed review, and reflection. I create these assignments to supplement each lesson of Pearson's Common Core Edition Algebra 1, Algebra 2, and Geometry courses. See also mathquest.net and twitter.com/mathquestEDU.

G.CO.5

Geometry 9-2 Complete Lesson: Reflections

Geometry 9-2 Complete Lesson: Reflections

Problem 1 Got It?

Problem 2 Got It?
1. Copy △ABC from Problem 2 to the coordinate plane on the canvas in black. Label A, B, and C.
2. Graph and label the following translation in blue or green.

Problem 4 Got It? Can you use properties of reflections to prove that △GHJ is equliateral?

Problem 4 Got It? Explain your response to the previous item.

Graphing: Graph the following translation of △FGH.
Label F', G', and H'.

Vocabulary: What is the relationship between a line of reflection and a segment joining corresponding points of the preimage and image?

Error Analysis: A classmate sketched this diagram to represent the translation below.
Explain your classmate's error.

Error Analysis: Show and label the correct location of A' on the canvas using blue or green.

Vocabulary: Use reflection notation to indicate the reflection of P(x, y) across the y-axis and the coordinates of the post-reflection imageP'.

Review Lesson 9-1: Consider the translation of point T.
Write a rule to describe the translation represented by the ordered pairs.

Review Lesson 7-2: A map of Alberta, Canada uses the scale 1 cm = 25 km. On the map, the distance from Calgary to Edmonton is 11.1 cm. How many kilometers apart are the two cities? Enter only a number, rounded to the nearest kilometer.

Preview Lesson 9-3: Draw the angles on the protractors using the indicated colors.

Vocabulary Review: △ABC is congruent to △RST and △ABC ≅ △RST. Match corresponding parts of the triangles below.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Reflect △ABC over the line segment. Draw and label its reflection, △A'B'C', in blue or green.

Reflection: Math Success

Problem 1 Got It?

Problem 2 Got It?
1. Copy △ABC from Problem 2 to the coordinate plane on the canvas in black. Label A, B, and C.
2. Graph and label the following translation in blue or green.

Problem 4 Got It? Can you use properties of reflections to prove that △GHJ is equliateral?

Problem 4 Got It? Explain your response to the previous item.

Graphing: Graph the following translation of △FGH.
Label F', G', and H'.

Vocabulary: What is the relationship between a line of reflection and a segment joining corresponding points of the preimage and image?

Error Analysis: A classmate sketched this diagram to represent the translation below.
Explain your classmate's error.

Error Analysis: Show and label the correct location of A' on the canvas using blue or green.

Vocabulary: Use reflection notation to indicate the reflection of P(x, y) across the y-axis and the coordinates of the post-reflection imageP'.

Review Lesson 9-1: Consider the translation of point T.
Write a rule to describe the translation represented by the ordered pairs.

Review Lesson 7-2: A map of Alberta, Canada uses the scale 1 cm = 25 km. On the map, the distance from Calgary to Edmonton is 11.1 cm. How many kilometers apart are the two cities? Enter only a number, rounded to the nearest kilometer.

Preview Lesson 9-3: Draw the angles on the protractors using the indicated colors.

Vocabulary Review: △ABC is congruent to △RST and △ABC ≅ △RST. Match corresponding parts of the triangles below.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Reflect △ABC over the line segment. Draw and label its reflection, △A'B'C', in blue or green.

Reflection: Math Success

Geometry 9-2 Complete Lesson: Reflections

Geometry 9-2 Complete Lesson: Reflections

Problem 1 Got It?

Problem 2 Got It? 1. Copy △ABC from Problem 2 to the coordinate plane on the canvas in black. Label A, B, and C.2. Graph and label the following translation in blue or green.

Problem 4 Got It? Can you use properties of reflections to prove that △GHJ is equliateral?

Problem 4 Got It? Explain your response to the previous item.

Graphing: Graph the following translation of △FGH. Label F', G', and H'.

Vocabulary: What is the relationship between a line of reflection and a segment joining corresponding points of the preimage and image?

Error Analysis: A classmate sketched this diagram to represent the translation below. Explain your classmate's error.

Error Analysis: Show and label the correct location of A' on the canvas using blue or green.

Vocabulary: Use reflection notation to indicate the reflection of P(x, y) across the y-axis and the coordinates of the post-reflection imageP'.

Review Lesson 9-1: Consider the translation of point T.Write a rule to describe the translation represented by the ordered pairs.

Review Lesson 7-2: A map of Alberta, Canada uses the scale 1 cm = 25 km. On the map, the distance from Calgary to Edmonton is 11.1 cm. How many kilometers apart are the two cities? Enter only a number, rounded to the nearest kilometer.

Preview Lesson 9-3: Draw the angles on the protractors using the indicated colors.

Vocabulary Review: △ABC is congruent to △RST and △ABC ≅ △RST. Match corresponding parts of the triangles below.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Reflect △ABC over the line segment. Draw and label its reflection, △A'B'C', in blue or green.

Reflection: Math Success

Problem 1 Got It?

Problem 2 Got It? 1. Copy △ABC from Problem 2 to the coordinate plane on the canvas in black. Label A, B, and C.2. Graph and label the following translation in blue or green.

Problem 4 Got It? Can you use properties of reflections to prove that △GHJ is equliateral?

Problem 4 Got It? Explain your response to the previous item.

Graphing: Graph the following translation of △FGH. Label F', G', and H'.

Vocabulary: What is the relationship between a line of reflection and a segment joining corresponding points of the preimage and image?

Error Analysis: A classmate sketched this diagram to represent the translation below. Explain your classmate's error.

Error Analysis: Show and label the correct location of A' on the canvas using blue or green.

Vocabulary: Use reflection notation to indicate the reflection of P(x, y) across the y-axis and the coordinates of the post-reflection imageP'.

Review Lesson 9-1: Consider the translation of point T.Write a rule to describe the translation represented by the ordered pairs.

Review Lesson 7-2: A map of Alberta, Canada uses the scale 1 cm = 25 km. On the map, the distance from Calgary to Edmonton is 11.1 cm. How many kilometers apart are the two cities? Enter only a number, rounded to the nearest kilometer.

Preview Lesson 9-3: Draw the angles on the protractors using the indicated colors.

Vocabulary Review: △ABC is congruent to △RST and △ABC ≅ △RST. Match corresponding parts of the triangles below.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Tell whether the pair of figures shows a reflection.

Use Your Vocabulary: Reflect △ABC over the line segment. Draw and label its reflection, △A'B'C', in blue or green.

Reflection: Math Success

Problem 2 Got It?
1. Copy △ABC from Problem 2 to the coordinate plane on the canvas in black. Label A, B, and C.
2. Graph and label the following translation in blue or green.

Graphing: Graph the following translation of △FGH.
Label F', G', and H'.

Error Analysis: A classmate sketched this diagram to represent the translation below.
Explain your classmate's error.

Review Lesson 9-1: Consider the translation of point T.
Write a rule to describe the translation represented by the ordered pairs.

Problem 2 Got It?
1. Copy △ABC from Problem 2 to the coordinate plane on the canvas in black. Label A, B, and C.
2. Graph and label the following translation in blue or green.

Graphing: Graph the following translation of △FGH.
Label F', G', and H'.

Error Analysis: A classmate sketched this diagram to represent the translation below.
Explain your classmate's error.

Review Lesson 9-1: Consider the translation of point T.
Write a rule to describe the translation represented by the ordered pairs.