Lines, Angles, and Rays, Oh My! - Atkins' 4th Grade Adventures · 2020-03-23 · Draw points,...
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Lines, and angles, and rays, Oh My! Evelyn Ball
Transcript of Lines, Angles, and Rays, Oh My! - Atkins' 4th Grade Adventures · 2020-03-23 · Draw points,...
Lines, and
angles, and
rays,
Oh My!
Evelyn Ball
CC.4.G.1
Draw points, lines, line
segments, rays, angles
(right, acute, obtuse),
perpendicular and
parallel lines. Identify
these in two-dimension
figures
point an exact location in space
Looks Like: A!
line a straight path of points that continues without end in both
directions
C D
line segment part of a line between two
endpoints
E F
ray part of a line that has one
endpoint and continues without end in one direction
G H
intersecting lines
lines in a plane that cross at exactly one point; these lines
form 4 (four) lines
O
Z
Q
R
P
parallel lines lines in a plane that are always the same distance apart, these
lines never cross
US
T
V
perpendicular lines
lines in a plane that intersect to form 4 (four) right angles
Z
Y
W X
angle formed by two rays or line
segments that share the same endpoint (vertex)
vertex a point where two rays or line
segments meet or join
right angle forms a square corner
90°
M
N O
straight angle
a straight line 180°
A C B
acute angle less than a right angle between 1° and 89°
G F
E
obtuse angle
greater than a right angle less than a straight angle
between 91° and 179°
Q
R S
A
po int— an exact location in space
l ine— a straight path of points that continues without end in both directions
l ine segment— part of a line between two endpoints
ray— part of a line that has one endpoint and continues without end in one direction
looks like:
read it: point A write it:
looks like:
read it: line BC line CB
write it:
looks like: read it: line segment DE line segment ED
write it:
looks like:
read it: ray FG
write it:
C !
D E F HG
G
i ntersect ing l ines— lines in a plane that cross at exactly one point; these lines form 4 (four) lines
para l l e l l i nes— lines in a plane that are always the same distance apart; these lines never intersect.
perpend i cu lar l ines— lines in a plane that intersect to form 4 (four) right angles
looks like:
looks like:
looks like:
!
Z !
X W
Y
V U
T S
Q
R O
Z
P
ang le— formed by two rays or line segments that have the same endpoint, the shared endpoint is called the vertex
r ight ang le— forms a square corner: 90°
stra ight ang le— forms a line: 180°
acute ang le— less than a right angle: between 1° and 89°
obtuse ang le— greater than a right angle and less than a straight angle: between 91° and 179°
read it: angle MNO angle ONM angle N write it: <MNO <ONM <N
!
M
N O P QN
R
S
T U
V
W X
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