Let’s Try It
Draw a line segment AB. Draw another line segment that starts from the middle of line AB.
D
Can you guess what BCD will be?
A
B
C
Use a protractor to measure angle ACD and BCD.
D
40°
Reading from the outer scale, angle ACD is 40°.
A
B
C
What do you notice when you add the two angles together?
Let’s Practise
1
I
30°
F
G
H
Riana measures IFG and finds that it is 30°. She says ‘Angle IGH must be 150°’. Explain how you know that she is correct.
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01/12/2021 15:00
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