On the A-day block, we quizzed over vocabulary and basics of transformations, an 18 pt quiz. All make-ups need to be done by Monday at 8:50 am. I am returning them 1st period Monday morning through 0B Tuesday morning. The unit test is the block after that.
We are almost finished with the unit. In the next block, our focus will be finding lines of symmetry and points of rotational symmetry in geometric figures, as well as continuing to work with "Are these congruent, justify by a sequence of rigid transformations." We will also practice reflecting across a line that is not an axis and rotating around a point that is not the origin.
Today in class we practiced graphing horizontal and vertical lines and lines through the origin: y=x, y=-x, y=4, x=-2, y=-3, x=5, and y=0 (the x-axis). We did an in-class activity that revisited the idea of congruence... describe a sequence of rigid motions that will map the pre-image exactly onto the image.
A grade was taken over HW #3 (1-5,7-9 on worksheet plus p 130: 1a-f, 2a-e, 4a-d. We went over the homework and warm-ups, using #9 on the worksheet to practice reflecting across a horizontal or vertical line that is not an axis.
We did an investigation of rotation in class (attached) where the rotatioin was done with patty paper.
For homework #4, there is a worksheet over rotation and one over transformations of a shaded triangle (attached). In 1st-3rd, problem 10 from the previous worksheet was added to homework. 0B did this in class and has already done the rotation worksheet.
On the task with the shaded triangle, each transformation goes back to the original black triangle.
Multiple choice formative assessment next time in class - 8 pts.
Test over Transformations: Wed-Thurs, Nov 6-7, 60 pts.
We are almost finished with the unit. In the next block, our focus will be finding lines of symmetry and points of rotational symmetry in geometric figures, as well as continuing to work with "Are these congruent, justify by a sequence of rigid transformations." We will also practice reflecting across a line that is not an axis and rotating around a point that is not the origin.
Today in class we practiced graphing horizontal and vertical lines and lines through the origin: y=x, y=-x, y=4, x=-2, y=-3, x=5, and y=0 (the x-axis). We did an in-class activity that revisited the idea of congruence... describe a sequence of rigid motions that will map the pre-image exactly onto the image.
A grade was taken over HW #3 (1-5,7-9 on worksheet plus p 130: 1a-f, 2a-e, 4a-d. We went over the homework and warm-ups, using #9 on the worksheet to practice reflecting across a horizontal or vertical line that is not an axis.
We did an investigation of rotation in class (attached) where the rotatioin was done with patty paper.
For homework #4, there is a worksheet over rotation and one over transformations of a shaded triangle (attached). In 1st-3rd, problem 10 from the previous worksheet was added to homework. 0B did this in class and has already done the rotation worksheet.
On the task with the shaded triangle, each transformation goes back to the original black triangle.
Multiple choice formative assessment next time in class - 8 pts.
Test over Transformations: Wed-Thurs, Nov 6-7, 60 pts.
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rotation_in-class activity_answers_below.pdf |