Answer:
A. If two lines intersect and form right angles, they intersect and form 90° angles.
Step-by-step explanation:
The first conditional can be described by ...
... if p then q
where
- p = two lines intersect and form right angles
- q = the lines are perpendicular
The second conditional can be described by ...
... if q then r
where
- r = they intersect and form 90° angles.
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The Law of Syllogism tells us that we can conclude ...
... if p then r
where p and r are as defined above. This translates to ...
... If two lines intersect and form right angles, then they intersect and form 90° angles. (matches selection A)