study words Mr grubb

congruent

• EVERYTHING is the same size and same shape.
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Similar

• Corresponding angles are congruent and corresponding sides are proportional.
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Transformation

• The movement of all the points of a figure according to a common operation.
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Translation

• A transformation that "slides" each point of a figure the same distance in the same direction.
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Reflection

• A transformation that "flips" a figure over a line of reflection.
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Rotation

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• A transformation that “turns” a figure about a fixed point through a given angle and a given direction.

Dilation

• A transformation that “multiplies” distances from the center by a common scale factor. It gets bigger or smaller.
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Scale Factor

• The ratio of any two corresponding lengths of the sides of two similar figures.
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Parallel Lines

• Two lines that never cross.
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Transversal

• A line that crosses two or more lines.
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Vertical Angles

• Angles that are opposite of each other. (congruent)

Corresponding Angles

• Angles that hold the same position. (congruent)

Alternate Exterior Angles

• Angles on opposite sides of the transversal and outside the parallel lines. (congruent)

Alternate Interior Angles

• Angles on opposite sides of the transversal and inside the parallel lines. (congruent)

Same Side Exterior Angles

• Angles on the same side of the transversal and outside the parallel lines. (supplementary)

Same Side Interior Angles

• Angles on the same side of the transversal and inside the parallel lines. (supplementary)

Supplementary Angles

• Angles that make a straight line and add up to 180⁰.