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19. 80°
21. angle 2 &4 will be the same.
Step-by-step explanation:
19. as they are supplementary
21. Vertically Opposite Angles (V.O.A)
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Answer:
The three adjacent angles form a straight angle =180°
180°- POQ+SOR= 4X
180°-(60°+40°)=4X
180°-100°=4X
80°=4X
X=(80/4)°
X=20°
QOR=4X
QOR=4(20°)
QOR=80°
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