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Warm up. A function is even. Point A(-3, 4) is on the even function. Name another point. A function is even. Point B(9, 2) is on the even function. Name another point. Reflect C(-5, -3) over the y-axis. Reflect D(2, -4) over the x-axis. Reflect E(-12, 4) over y = -x. (3 , 4). (- 9, 4).

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Presentation Transcript
warm up
Warm up
  • A function is even. Point A(-3, 4) is on the even function. Name another point.
  • A function is even. Point B(9, 2) is on the even function. Name another point.
  • Reflect C(-5, -3) over the y-axis.
  • Reflect D(2, -4) over the x-axis.
  • Reflect E(-12, 4) over y = -x.

(3, 4)

(-9, 4)

C’(5, -3)

D’(2, 4)

E’(-4, 12)

skills check

Skills Check

Are you ready?

rotate 90 clockwise about the origin same as 270 counterclockwise
Rotate 90 Clockwise about the Origin(Same as 270 Counterclockwise)

Change the sign of x and switch the order

rotate 90 counterclockwise about the origin same as 270 clockwise
Rotate 90 Counterclockwise about the Origin(Same as 270 Clockwise)

Change the sign of y and switch the order

rotate 180 about the origin
Rotate 180about the Origin

ONLY Change the signs

rotational symmetry
Rotational Symmetry

Any figure that can be turned or rotated less than 360° about a fixed point so that the figure looks exactly as it does in its original position.

slide18
Which figures have rotational symmetry? For those that do, describe the rotation that map the figure onto itself.

Regular pentagon

Rhombus

Isosceles triangle

NO

NO

classwork

Classwork

Rotations Practice Worksheet

homework

Homework

Rotations HW Worksheet

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