Geometry 9-6 Complete Lesson: Dilations

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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.

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Geometry 9-6 Complete Lesson: Dilations

Geometry 9-6 Complete Lesson: Dilations

Solve It! The pupil is the opening in the iris that lets light into the eye. Depending on the amount of light available, the size of the pupil changes. Observe the size and shape of the iris in normal light and in dim light. What charcteristics stay the same and what charcteristics change?

Solve It! How do these observations compare to transformation of figures you learned about earlier in the chapter?

Problem 1 Got It?

Problem 2 Got It? Match the corrdinates of the vertices after the following transformation.

Problem 2 Got It? Reasoning: How are the pairs of segments from the item above related?

Problem 3 Got It?

Explain and correct the error(s).

Explain and correct the error(s).

Review Lesson 9-5: △JKL has vertices J(23,2), K(4, 1), and L(1, 23). What are the coordinates of J', K', and L' after the translation?
Not all ordered pairs will be used.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of a. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of b. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of c. Enter only a number.

Vocabulary Review: Write the word isometry, congruence, or transformation to complete the sentence.
A mapping that results in a change in the position, size, or shape of a geometric figure is called a/an ?.

Use Your Vocabulary: Which of the pairs of items above shows a dilation?

Reflection: Math Success

Solve It! The pupil is the opening in the iris that lets light into the eye. Depending on the amount of light available, the size of the pupil changes. Observe the size and shape of the iris in normal light and in dim light. What charcteristics stay the same and what charcteristics change?

Solve It! How do these observations compare to transformation of figures you learned about earlier in the chapter?

Problem 1 Got It?

Problem 2 Got It? Match the corrdinates of the vertices after the following transformation.

Problem 2 Got It? Reasoning: How are the pairs of segments from the item above related?

Problem 3 Got It?

Explain and correct the error(s).

Explain and correct the error(s).

Review Lesson 9-5: △JKL has vertices J(23,2), K(4, 1), and L(1, 23). What are the coordinates of J', K', and L' after the translation?
Not all ordered pairs will be used.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of a. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of b. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of c. Enter only a number.

Vocabulary Review: Write the word isometry, congruence, or transformation to complete the sentence.
A mapping that results in a change in the position, size, or shape of a geometric figure is called a/an ?.

Use Your Vocabulary: Which of the pairs of items above shows a dilation?

Reflection: Math Success

Geometry 9-6 Complete Lesson: Dilations

Geometry 9-6 Complete Lesson: Dilations

Solve It! The pupil is the opening in the iris that lets light into the eye. Depending on the amount of light available, the size of the pupil changes. Observe the size and shape of the iris in normal light and in dim light. What charcteristics stay the same and what charcteristics change?

Solve It! How do these observations compare to transformation of figures you learned about earlier in the chapter?

Problem 1 Got It?

Problem 2 Got It? Match the corrdinates of the vertices after the following transformation.

Problem 2 Got It? Reasoning: How are the pairs of segments from the item above related?

Problem 3 Got It?

Explain and correct the error(s).

Explain and correct the error(s).

Review Lesson 9-5: △JKL has vertices J(23,2), K(4, 1), and L(1, 23). What are the coordinates of J', K', and L' after the translation? Not all ordered pairs will be used.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of a. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of b. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of c. Enter only a number.

Vocabulary Review: Write the word isometry, congruence, or transformation to complete the sentence. A mapping that results in a change in the position, size, or shape of a geometric figure is called a/an __?__.

Use Your Vocabulary: Which of the pairs of items above shows a dilation?

Reflection: Math Success

Solve It! The pupil is the opening in the iris that lets light into the eye. Depending on the amount of light available, the size of the pupil changes. Observe the size and shape of the iris in normal light and in dim light. What charcteristics stay the same and what charcteristics change?

Solve It! How do these observations compare to transformation of figures you learned about earlier in the chapter?

Problem 1 Got It?

Problem 2 Got It? Match the corrdinates of the vertices after the following transformation.

Problem 2 Got It? Reasoning: How are the pairs of segments from the item above related?

Problem 3 Got It?

Explain and correct the error(s).

Explain and correct the error(s).

Review Lesson 9-5: △JKL has vertices J(23,2), K(4, 1), and L(1, 23). What are the coordinates of J', K', and L' after the translation? Not all ordered pairs will be used.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of a. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of b. Enter only a number.

Review Lesson 7-2: TRSU ~ NMYZ. Find the value of c. Enter only a number.

Vocabulary Review: Write the word isometry, congruence, or transformation to complete the sentence. A mapping that results in a change in the position, size, or shape of a geometric figure is called a/an __?__.

Use Your Vocabulary: Which of the pairs of items above shows a dilation?

Reflection: Math Success

Review Lesson 9-5: △JKL has vertices J(23,2), K(4, 1), and L(1, 23). What are the coordinates of J', K', and L' after the translation?
Not all ordered pairs will be used.

Vocabulary Review: Write the word isometry, congruence, or transformation to complete the sentence.
A mapping that results in a change in the position, size, or shape of a geometric figure is called a/an ?.

Review Lesson 9-5: △JKL has vertices J(23,2), K(4, 1), and L(1, 23). What are the coordinates of J', K', and L' after the translation?
Not all ordered pairs will be used.

Vocabulary Review: Write the word isometry, congruence, or transformation to complete the sentence.
A mapping that results in a change in the position, size, or shape of a geometric figure is called a/an ?.