Warm up
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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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Warm up

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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)

C’(5, -3)

D’(2, 4)

E’(-4, 12)


Review Homework


Skills Check

Are you ready?


Rotations


Rotate 90 Clockwise about the Origin(Same as 270 Counterclockwise)

Change the sign of x and switch the order


Rotate 90° clockwiseabout the origin


Rotate 90° clockwiseabout the origin


Rotate 90 Counterclockwise about the Origin(Same as 270 Clockwise)

Change the sign of y and switch the order


Rotate 90° counterclockwiseabout the origin


Rotate 90° counterclockwiseabout the origin


Rotate 180about the Origin

ONLY Change the signs


Rotate 180° about the origin


Rotate 180° about the origin


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.


Ambigrams – Look the same right side up and upside down


Rotational Symmetry in the parking lot


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

Rotations Practice Worksheet


Homework

Rotations HW Worksheet


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