Naming Angles and Its Kinds

This will help you in naming an angle and identifying its kinds.

For more instructional resources, CLICK me here! 👇👇👇
https://tinyurl.com/y9muob6q

LIKE and FOLLOW me here! 👍👍👍
https://tinyurl.com/ycjp8r7u
https://tinyurl.com/ybo27k2u

1. Grade 7–Mathematics
Quarter III
NAMINGANGLESAND
ITSKINDS

2. Prepared by:
Jo-Ann E. Rogon

3. Draw and label the following.
1. Ray BA ��
2. Ray BC ��
3. ��and ��are
opposite rays.
��B
collinear

4. Can you make the figure non-collinear?
��B
collinear
ANGLE

5. ANGLES
Naming an Angle
Kinds of Angle

6. Angle
•An Angle is a
figure formed
by two non-
collinear rays
with a common
endpoint, called
the vertex.
��and ��
????????????????????????????????????�
rays C
vertex
B
A

7. Angle
•Degrees ( °) –the unit used in
measuring an angle. Ex: 78°
•Protrator–the device used in
measuring an angle.
•∠-symbol

8. Angle and Points
⚫Angles can
have points in
the interior, in
the exterior or
on the angle.
raysvertex
DE
F
A
B
C

9. Naming An Angle
⚫Using 3 points
⚫Using the vertex
⚫Using a number
or letter.
A
C
B
vertex
B 1
∠ABC or ∠CBA
∠B
∠1

10. Using 3 points:
∠ZXY or ∠YXZ
∠ZXW or ∠WXZ
∠WXY or ∠YXW
Note: Using the
vertex is for only one
angle. Therefore,
there is no ∠X in this
figure.
Using the number or
letter: ∠1 and ∠2
Name the angles.
vertex
2
W
Y
X
Z
1

11. ⚫Using 3 points
⚫Using the vertex
⚫Using a number
or letter.
W
Y
X
vertex
X 3
∠WXY or ∠YXW
∠X
∠3
��and ��
It’s your turn!

12. KINDS OF ANGLES
Acute Angle:
-an angle whose measure is
greater than 0°but less than 90.
Right Angle:
-an angle whose
measure is exactly 90 .

13. KINDS OF ANGLES
Obtuse Angle:
-an angle whose measure is greater than
90 but less than180.

14. Completethetable.Nametheangleand
identifyitskind.
Name
of
Angle
Vertex
Rays
(sides)
Kinds
of
Angle
W
Y
X
Z

15. Name of
Angle Vertex
Rays
(sides)
Kinds of
Angle
W
Y
X
Z
∠���X Right
∠���X ��and ��Obtuse
∠���X��and ��Acute
��and ��

16. Do you see angles in
the carousel?
Acute Angle
Right Angle
Obtuse Angle

17. Thank You!