STAAR Simulator Important Formulas and Vocabulary

Front

What does the algebraic rule \( (x, y) \rightarrow (x, -y) \) represent?

Back

Reflection across the x-axis.

Front

What is the formula to find the new perimeter with dilations?

Back

NP = OP * k

Front

What does the algebraic rule \( (x, y) \rightarrow (-x, y) \) represent?

Back

Reflection across the y-axis.

Front

What does the algebraic rule \( (x, y) \rightarrow (y, -x) \) represent?

Back

Rotation of 90 degrees clockwise or 270 degrees counter-clockwise.

Front

What does the algebraic rule \( (x, y) \rightarrow (x-2, y+1) \) represent?

Back

Translation that went 2 points left and 1 point up.

Front

What is the definition of a reflection in geometry?

Back

A transformation that flips a figure over a line, creating a mirror image.

Front

What is the definition of a rotation in geometry?

Back

A transformation that turns a figure around a fixed point at a certain angle.

Front

What is the definition of a translation in geometry?

Back

A transformation that moves every point of a figure the same distance in the same direction.

Front

What does the variable 'k' represent in the dilation formula?

Back

The scale factor that determines how much the figure is enlarged or reduced.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.