12. ANGLE
A
B
O
In geometry, an angle is
defined as the figure
formed by two rays
meeting at a common end
point. An angle is
represented by the symbol
∠
∠ AOB or ∠ BOA
20. Measure Me! And Act Me!
The teacher will divide the class into Two Groups
The leader of the group will pick an invitation that
contains a mission to be solved.
Your mission is to help Mr. Angle to find his five sons,
the son of Mr. Angle was classified according to the
measure of the angles.
In order to find Mr. Angles sons each member of the
group will have an assigned task, it is to measure the
given angles, the member that will measure the angle
will also act using his/her 2 hands to perform the
measured angle in order for the next member of the
group to write down in the WHITE BOARD the correct
classification and measure of the Angles.
The teacher will put your chosen envelop in front of
the row of your respective groups.
23. RIGHT
ANGLE
A right angle is
always equal to
90 degrees. Any
angle less than
90 degrees is an
acute angle
whereas any
angle greater
than 90 degrees
is an obtuse
angle.
90O
24. OBTUSE
ANGLE
It is the angle
which lies
between 90
degrees and 180
degrees or in
other words; an
obtuse angle is
greater than 90
degrees and less
than 180
degrees.
135O
