Unit # 1 Vocabulary Review 1

coordinate plane 2

3 -a plane (2 dimensional) -formed by intersection -of horizonal line ( x axis) -of vertical line (y axis)

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6 ordered pair - numbers that identify - a point on - a coordinate plane

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8 Why does this represent a plane?

9 plane flat surface extends infinitely in all directions has two dimensions

10 A? B? C?

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measure of angle What unit is used to measure an angle? 13

14 Degrees

15 Why type of angle? A? B? C? D? E? F?

16 Right Angle

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18 acute angle an angle whose measure is less than 90 degrees

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20 obtuse angle an angle whose measure is greater than 90 degrees but less than 180 degrees

21 Obtuse angle Why are these obtuse angles?

22 What type of angle?

23 What type of angles?

complementary angles two angles whose measures add to 90 degrees 24

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26 supplementary angles? vertical angles? congruent angles?

supplementary angles two angles whose measures have a sum of 180 degrees 27

28 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 30

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congruent angles angles that have the same measure 32

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37 What concept do these figures represent?

line of symmetry the imaginary “mirror” in line symmetry 38

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transformation - transform a change in the size or position of a figure 40

transformations (transform) translations (translate) rotations (rotate) reflections (reflect) 41

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44 reflection

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46 translation

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48 rotation

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50 translation

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52 reflection

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54 translation

Translation – translate a transformation movement (slide) of a figure along a straight line 55

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57 Translation movement of a figure along a straight line

rotation - rotate a transformation in which a figure is turned around a point 58

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reflection a transformation of a figure that flips the figure across a line 60

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