What is this?
Parallel lines
What is this?
An obtuse angle
What is this?
Perpendicular lines
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An acute angle
What is this?
An acute angle
What is this?
A right angle
What is this?
An obtuse angle
What is this?
A right angle
What is this?
An acute angle
What is this?
An acute angle
What is this?
a right angle
What is this?
An obtuse angle
What is this?
A straight line
What is this?
A ray
What is this?
an acute angle
What is this?
An acute angle