Download presentation
Presentation is loading. Please wait.
1
LESSON 1 Lines, Rays, and Angles
2
Vocabulary to know!
3
an exact location in space
point an exact location in space DRAW IT READ IT WRITE IT point A point A A
4
line a straight path of points that continues without end in BOTH directions DRAW IT READ IT WRITE IT line BC line CB BC CB b c
5
ray part of a line that has one endpoint and continues on without end in ONE direction DRAW IT READ IT WRITE IT ray FG FG F G
6
part of a line between two end points
line segment part of a line between two end points DRAW IT READ IT WRITE IT line segment DE line segment ED DE ED d e
7
angle Formed by two rays or line segments that have the same endpoint. The shared endpoint is called a vertex. DRAW IT READ IT WRITE IT F G H angle FGH angle HGF angle G ∠ FGH ∠ HGF ∠ G
8
Types of Angles!
9
right angle forms a square corner
10
straight angle forms a line
11
is less than a right angle
acute angle is less than a right angle
12
is greater than a right angle and less than a straight angle
obtuse angle is greater than a right angle and less than a straight angle
13
Guided Questions
14
Name a Line A E d c B
15
Name a Ray A E d c B
16
Draw and label a line segment named XY
17
Draw and label an obtuse angle named ∠ JKL
18
Draw and label a straight angle named ∠ WXY
19
Pattern Block Angles
20
all of the angles in a hexagon are obtuse.
Trace a hexagon and label all the points like below. What kind of angles do you see? A B all of the angles in a hexagon are obtuse. F C E D
21
all of the angles in a square are right.
Trace a square and label all the points like below. What kind of angles do you see? G H all of the angles in a square are right. j i
22
ACUTE ∠KNM, ∠ NML OBTUSE ∠ NKL, ∠ KLM
Trace a trapezoid and label all the points like below. Name 2 acute and 2 obtuse angles. K L ACUTE ∠KNM, ∠ NML OBTUSE ∠ NKL, ∠ KLM N M
23
all of the angles in an equilateral triangle are acute.
Trace a triangle and label all the points like below. What kind of angles do you see? P all of the angles in an equilateral triangle are acute. O Q
Similar presentations
