Angle Terminology https://youtu.be/xw-yhbuwAgg
Fill in the gaps in the appropriate spaces below (possible solutions are at the bottom of the page).
Name Description Figure
Point Points are labelled with _______________
letters. 𝑃
Line A line goes on __________ in both directions
as indicated by the arrows. The line at right 𝐵
can be called line _____ or line BA.
𝐴
Ray A ray goes on forever in one _____________
and ______ at a point in the other direction. 𝐵
The ray in the image can be called ray AB.
𝐴
Line Segment or Has a ________ length. It ends at a point in 𝐵
Line Interval both directions. The line segment at right is
called segment AB or segment _____. 𝐴
Vertex and Arms of When two rays meet at a point, an ________
an Angle is formed. The point at which they meet is arm
called the __________.
vertex
The two rays are referred to as the _______ of arm
the angle.
Angle Notation The angle at right could be called
_____________ or ______ ______ A
B
C
Parallel Lines The two line segments at right are parallel. 𝐵
We say ______________.
𝐷
𝐴
𝐶
Perpendicular Lines The two line segments at right are perpendicular. 𝐴
𝐵
We say ____________.
𝐶 𝐷
Fill in the spaces above with the following words/symbols: capital ends
AB∥CD arms
∠ABC AD⊥BC
AB vertex direction angle BA ∠CBA
fixed forever
,Example 1 https://youtu.be/3QBFekvxA9M
Name each angle marked below.
(a) (b) (c)
X P Q T U
Y S V
Z R
Question 1
Draw the following figures.
(a) line CD (b) ∠RST (c) line interval GH
(d) Two lines EF and GH, (e) reflex ∠ABC (f) Two lines JK and LM,
such that EF⊥GH such that JK∥LM
Question 2
Name the following figures.
(a) (b) (c) F
𝑄
𝑆
G
𝑇 H
Question 3
Name each angle marked below.
(a) (b) V (c) K L
B
C
D
W N
A M
E U J
X
(d) G H (e) (f) Q
F W X
P R
E
Z Y
D
T S
Question 4
Name every angle inside the figure below (excluding reflex and straight angles).
A B
C E D
39 | P a g e
, Classifying Angles https://youtu.be/pdSRR0kdRPE
Fill in the gaps in the appropriate spaces below (possible solutions are at the bottom of the page).
Name of Angle Size of Angle Figure
Acute
angle
Right
90°
angle
Between 90° and 180°
Straight
angle
Reflex
Between 180° and 360°
angle
360°
Fill in the spaces above with the following words/symbols/diagrams:
180° Between 0° and 90°
Obtuse
angle Revolution
40 | P a g e
Fill in the gaps in the appropriate spaces below (possible solutions are at the bottom of the page).
Name Description Figure
Point Points are labelled with _______________
letters. 𝑃
Line A line goes on __________ in both directions
as indicated by the arrows. The line at right 𝐵
can be called line _____ or line BA.
𝐴
Ray A ray goes on forever in one _____________
and ______ at a point in the other direction. 𝐵
The ray in the image can be called ray AB.
𝐴
Line Segment or Has a ________ length. It ends at a point in 𝐵
Line Interval both directions. The line segment at right is
called segment AB or segment _____. 𝐴
Vertex and Arms of When two rays meet at a point, an ________
an Angle is formed. The point at which they meet is arm
called the __________.
vertex
The two rays are referred to as the _______ of arm
the angle.
Angle Notation The angle at right could be called
_____________ or ______ ______ A
B
C
Parallel Lines The two line segments at right are parallel. 𝐵
We say ______________.
𝐷
𝐴
𝐶
Perpendicular Lines The two line segments at right are perpendicular. 𝐴
𝐵
We say ____________.
𝐶 𝐷
Fill in the spaces above with the following words/symbols: capital ends
AB∥CD arms
∠ABC AD⊥BC
AB vertex direction angle BA ∠CBA
fixed forever
,Example 1 https://youtu.be/3QBFekvxA9M
Name each angle marked below.
(a) (b) (c)
X P Q T U
Y S V
Z R
Question 1
Draw the following figures.
(a) line CD (b) ∠RST (c) line interval GH
(d) Two lines EF and GH, (e) reflex ∠ABC (f) Two lines JK and LM,
such that EF⊥GH such that JK∥LM
Question 2
Name the following figures.
(a) (b) (c) F
𝑄
𝑆
G
𝑇 H
Question 3
Name each angle marked below.
(a) (b) V (c) K L
B
C
D
W N
A M
E U J
X
(d) G H (e) (f) Q
F W X
P R
E
Z Y
D
T S
Question 4
Name every angle inside the figure below (excluding reflex and straight angles).
A B
C E D
39 | P a g e
, Classifying Angles https://youtu.be/pdSRR0kdRPE
Fill in the gaps in the appropriate spaces below (possible solutions are at the bottom of the page).
Name of Angle Size of Angle Figure
Acute
angle
Right
90°
angle
Between 90° and 180°
Straight
angle
Reflex
Between 180° and 360°
angle
360°
Fill in the spaces above with the following words/symbols/diagrams:
180° Between 0° and 90°
Obtuse
angle Revolution
40 | P a g e
