1. Identify the different kinds of lines.
a. b. c.

2. Name the given rays.
• Look at the clock.
• What time is it now?
B
A
F
G
C
D E
H

3. Rosh, Lhei, and Claire attend piano
lessons every Saturday. Rosh
starts her lesoon at 3:00 p.m., Lhei
at 2:00 p.m., and Clare at 12:45
p.m.
• Who attend piano lessons every
Saturday?
• At what time does Rosh start her piano
lesson?
• How about Lhei? Clare?
• If you are going to show in the clock the
time their lessons start, how will you do
it?

4. In pairs, draw the hand positions of the
clock based on the situation given.

5. • For those pairs who were
able to draw, label correctly
the hands of the clock and
explain your work.
• The clocks represents a
ray.
• Label each ray with capital
letters.
• The hands shown by the
clock represent an angle.

6. Look at the hands of the clock. How many
hands does it have? What geometric figure
does each hand represent?
C
B
A
1

7. Ray AB meets with ray AC at point A.
when two rays meet at a common
endpoint, they form an angle. Point A,
the common endpoint, is called the
vertex. An angle can be named in 3
ways.
BAC is read as “angle BAC.”
CAB is read as “angle CAB.”
A is read as “angle A” or 1 is read as
“angle 1.”

8. An angle is measured in degrees (°).
Angles can be classified according to their
measurements.
A right angle measures 90°. It
forms a square corner.
An acute angle measures less
than 90°. It is smaller than a
right angle.
An obtuse angle measure more
than 90° but less than 180°.

9. Name the angles below. What kind
of angles are they?

10. Tell whether each kind of angle
is right, acute, or obtuse.
1. 2. 3.
4. 5.

11. A. Tell whether each kind of angle
is right, acute, or obtuse.
1. 2. 3.
4. 5.

12. B. Draw the following
angles:
1. ABC – acute angle
2. DEF – obtuse angle
3. GHI – right angle

13. Give the kind of angle represented
by each of the following figures:
1. 2. 3.
4. 5.

14. An angle is formed when two rays
meet at a common endpoint. It is
measured in degrees (°). Angles can
be classified according to their
measurements.
A right angle measures 90°. It
forms a square corner.
An acute angle measures less
than 90°. It is smaller than a right
angle.
An obtuse angle measures more
than 90°, but less than 180°.

15. A. Using the figure at the right, identify the
given angle (oriented counter clockwise) is
right, acute, or obtuse.
1. AOB
2. BOC
3. DOE
4. FOD
5. COE
O
A
B
C
D
E
F

16. B. Group pupils into six for the “Bring Me
Game”. Let them bring the object that is
required. The first group to bring the object
will be given one point.
1. Objects with an acute angle. –
example: triangular objects
2. Objects with an obtuse angle –
example: picture stand
3. Objects with a right angle –
example: chair

17. A. Give what is asked for in each item.
1. Name 2 objects with right angles.
2. Name 2 objects with acute angles.
3. Name 2 objects with obtuse angels.
B. Draw your dream house using
different angles. Label the angles
used.

18. Write the letter of the correct answer.
1. What geometric figure is formed when
two rays meet at a common endpoint?
a. line b. point c. angle d.
polygon
2. Which is the same as angle AOB?
a. OAB b. OAB c. BAO d.
O
3. What kind of angle is formed by the
corner of a square table?
a. right angle c. obtuse angle
b. acute angle d. none of the

19. 4. What kind of angle is shown by
an opened book whose measure
is greater than 90°?
a. right angle c. obtuse
angle
b. acute angle d. right or
acute angle
5. What kind of angle is illustrated
when the hands of a clock form

20. Draw a flower if the angle (oriented counter
clockwise) shown is an acute angle, a star
if it is a right angle, or a diamond if it if an
obtuse angle.
1. 2. 3.
4. 5.

21. Study the illustration.
1. Name 5 acute angles.
2. Name 2 right angles.
3. Name 3 obtuse angles. O
A
B
C
D
E
F