unit # 1 vocabulary review 1. coordinate plane 2
TRANSCRIPT
Unit # 1 Vocabulary Review
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coordinate plane
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- a plane (2 dimensional)- formed by intersection - of horizonal line ( x axis)- of vertical line (y axis)
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ordered pair- numbers that identify- a point on- a coordinate plane
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Why does this represent a plane?
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plane• flat surface• extends infinitely in all
directions• has two dimensions
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A? B? C?
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measure of angle
What unit is used to measure an angle?
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Degrees
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Why type of angle? A? B? C? D? E? F?
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Right Angle
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acute angle• an angle• whose measure • is less than 90 degrees
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obtuse angle• an angle • whose measure is • greater than 90 degrees but• less than 180 degrees
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Obtuse angle
Why are these obtuse angles?
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What type of angle?
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What type of angles?
complementary angles
complementary angles• two angles• whose measures • add to 90 degrees
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supplementary angles?vertical angles? congruent angles?
supplementary angles
• two angles• whose measures• have a sum of 180 degrees
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Why are figure 1 and figure 2 both examples of supplementary angles?
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vertical angles
• a pair of• opposite congruent angles• formed by intersecting lines
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congruent angles
• angles • that have the same measure
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What concept do these figures represent?
line of symmetry
the imaginary “mirror” in line symmetry
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transformation - transform
• a change • in the size or• position of a figure
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transformations (transform)
translations (translate)rotations (rotate)
reflections (reflect)
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reflection
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translation
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rotation
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translation
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reflection
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translation
Translation – translate
• a transformation• movement (slide)• of a figure • along a straight line
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Translation• movement • of a figure• along a straight line
rotation - rotate
• a transformation• in which a figure• is turned around a point
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reflection
• a transformation• of a figure• that flips the figure across a line
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