Presentation 3
Presentation 3
Presentation 3
Mr. Trujillo
TEKS 8th Grade
• (10) Two-dimensional shapes. The student applies mathematical process standards
to develop transformational geometry concepts. The student is expected to:
• (A) generalize the properties of orientation and congruence of rotations,
reflections, translations, and dilations of two-dimensional shapes on a
coordinate plane;
• (B) differentiate between transformations that preserve congruence and
those that do not;
• (C) 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 plane using an algebraic representation;
and
• (D) model the effect on linear and area measurements of dilated two-
dimensional shapes.
Transformation
• https://www.mathplayground.com/ShapeMods/index.html
Translation
• https://www.ixl.com/math/geometry/translations-graph-the-image
Reflection
• https://www.ixl.com/math/geometry/reflections-graph-the-image
Rotation
• Is when a figure turns around a fixed center point. One point on the plane,
the center of rotation, is fixed and everything else on the plane rotates
about that point by a given angle.
Example of Rotation
Link to Interactive Rotation of a Figure
• https://www.ixl.com/math/geometry/rotations-graph-the-image