Geometry H 4.1-4.2 Check-up

Front

What is the image of L(-7, -8) after a reflection in the y-axis?

Back

L'(7, -8) - The reflection in the y-axis changes the sign of the x-coordinate.

Front

What is the image of P(4, -3) after the translation defined by (x, y) → (x-6, y+2)?

Back

P'(-2, -1) - The translation moves the point left by 6 and up by 2.

Front

How many lines of symmetry does a regular pentagon have?

Back

5 - A regular pentagon has 5 lines of symmetry.

Front

Define a rigid motion in geometry.

Back

A rigid motion is a transformation that preserves length and angle measures.

Front

What is the component form of vector AB if A(0, 0) and B(6, 2)?

Back

<6, 2> - The component form is found by subtracting the coordinates of A from B.

Front

What happens to the coordinates of a point after a reflection in the x-axis?

Back

The y-coordinate changes sign: (x, y) → (x, -y).

Front

What is the effect of a translation on a point's coordinates?

Back

A translation moves a point by adding specific values to its coordinates.

Front

How do you determine the number of lines of symmetry in a shape?

Back

Count the number of ways the shape can be folded to match itself.

Front

What is the image of the point (3, 4) after a reflection in the line y = x?

Back

(4, 3) - The coordinates are swapped.

Front

What is the transformation rule for a 90-degree rotation counterclockwise about the origin?

Back

(x, y) → (-y, x).