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Geometry

Geometry. Unit 5. Warm –up. Describe the translation that moved the rectangle ABCD to rectangle A’B’C’D’. Unit 5 Geometry. Translation Reflection Rotation Horizontal and vertical stretch/ compress. Translation – slide.

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Geometry

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  1. Geometry Unit 5

  2. Warm –up • Describe the translation that moved the rectangle ABCD to rectangle A’B’C’D’.

  3. Unit 5 Geometry • Translation • Reflection • Rotation • Horizontal and vertical stretch/ compress

  4. Translation – slide • A translation slides an object a fixed distance in a given direction. • The original object and its translation have the same shape and size. They face in the same direction. • The translation preserves the distance and the lettering order.

  5. The rules of translation For any real number a or b , Sliding to the right Sliding to the left Sliding up Sliding down

  6. Example • What is the rule for the translation?

  7. Example • What is the translation for triangle ABC to A’B’C’? • Write in words. • Write the rule.

  8. Warm –up • What is the translation of the quadrilateral EFGH to E’F’G’H’?

  9. Reflection – Flip • A reflection is a flip over a line. • Every point has the same distance from the central line. • It has the same size of the original image. • A reflection can happen across x- axis or y- axis or any line

  10. The rules for reflection • For x- axis reflection change the sign of y • For y- axis reflection change the sign of x • For the line y=x , swap both • For the line

  11. Example • What is the line of reflection? What is the rule?

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