Explain the effect of translations, reflections over the x- or y-axis, and rotations limited to 90°, 180°, 270°, and 360° as applied to two-dimensional shapes on a coordinate Video Lesson

About This Video

Curriculum-aligned Grade 8 Mathematics lesson video for Explain the effect of translations, reflections over the x- or y-axis, and rotations limited to 90°, 180°, 270°, and 360° as applied to two-dimensional shapes on a coordinate. Use it for classroom preview, instruction support, or home review.

This watch page is dedicated to the video. For the complete text lesson plan, activities, standards alignment, and answer guides, use the companion lesson page: Explain the effect of translations, reflections over the x- or y-axis, and rotations limited to 90°, 180°, 270°, and 360° as applied to two-dimensional shapes on a coordinate lesson plan.

Video Learning Notes

In this lesson, students learned how translations, reflections over the x- or y-axis, and rotations of 90°, 180°, 270°, and 360° affect two-dimensional shapes on the coordinate plane. They practiced using algebraic rules to describe these transformations and explored how dilations change the size and area of shapes. Understanding these concepts helps students visualize and analyze geometric changes using coordinates and algebra.

Learning Goals

• Explain how translations move two-dimensional shapes on the coordinate plane using algebraic rules.
• Describe the effect of reflections over the x-axis and y-axis on two-dimensional shapes using algebraic expressions.
• Explain rotations of 90°, 180°, 270°, and 360° around the origin and how they change the coordinates of shapes.
• Model how dilations change the linear dimensions and area of two-dimensional shapes on the coordinate plane.

Curriculum Context

Grade: Grade 8

Subject: Mathematics

Curriculum: TEKS