Page 15 - TB_5B
P. 15
Activity 1 Parallel Lines and Corresponding Angles

Learn about parallel lines.

2 lines in a plane that are the same distance apart l distance
at every point and never meet are called m
parallel lines. lm
Lines l and m are parallel lines.

is a symbol that indicates the lines are parallel.
l m means, “the straight lines l and m are parallel
to each other.”

Use 2 right triangle rulers to draw parallel lines.

l
m

1 . When an image that we perceive is different from the actual thing,

it is called an optical illusion. The pictures below show 2 examples of
optical illusions. Tell whether the lines are parallel or not.

a. b.

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