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Learning Activity 3:
Relationship Between Angles
A. Learning Indicators
In this mathematics lesson, the learning indicators that you must achieve after studying
this module are Explaining the properties of right and right angles that are opposite to each
other, Relationship of angles on two Parallel Lines, and Determining solutions to problems
concerning the properties of right and right angles opposite each other, the relationship of the
angles on two parallel lines.
B. Learning Activities
Straightening and Right Angles (Sudut Berpenyiku)
Figure 11. shows that
∠ = ° and ∠ = °
apply
° + ° = 90°
° = 90° − °
° = 90° − °
The relationship between ° and ° is called a right angle (sudut berpenyiku).
Figure 11. Right Angle (sudut berpenyiku)
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