unit # 1 vocabulary review
DESCRIPTION
Unit # 1 Vocabulary Review. coordinate plane. a plane (2 dimensional) formed by intersection of horizonal line ( x axis) of vertical line (y axis). ordered pair - numbers that identify - a point on - a coordinate plane. Why does this represent a plane?. plane flat surface - PowerPoint PPT PresentationTRANSCRIPT
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)
4
5
6
ordered pair- numbers that identify- a point on- a coordinate plane
7
8
Why does this represent a plane?
9
plane• flat surface• extends infinitely in all
directions• has two dimensions
10
A? B? C?
11
12
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
17
18
acute angle• an angle• whose measure • is less than 90 degrees
19
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
complementary angles• two angles• whose measures • add to 90 degrees
24
25
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?
29
vertical angles
• a pair of• opposite congruent angles• formed by intersecting lines
30
31
congruent angles
• angles • that have the same measure
32
33
34
35
36
37
What concept do these figures represent?
line of symmetry
the imaginary “mirror” in line symmetry
38
39
transformation - transform
• a change • in the size or• position of a figure
40
transformations (transform)
translations (translate)rotations (rotate)
reflections (reflect)
41
42
43
44
reflection
45
46
translation
47
48
rotation
49
50
translation
51
52
reflection
53
54
translation
Translation – translate
• a transformation• movement (slide)• of a figure • along a straight line
55
56
57
Translation• movement • of a figure• along a straight line
rotation - rotate
• a transformation• in which a figure• is turned around a point
58
59
reflection
• a transformation• of a figure• that flips the figure across a line
60
61