© M. Tallman. When you line up a piece of paper with the vertex of the angle, you can see that it...
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Transcript of © M. Tallman. When you line up a piece of paper with the vertex of the angle, you can see that it...
© M. Tallman
When you line up a piece of paper with the vertex of the angle, you can see that it lines up.
This angle is right and/or 90º.
vertex
Right Angle- an angle formed when two perpendicular lines
meet or cross.
© M. Tallman
When you line up a piece of paper with the vertex of the angle, you can see that that angle is smaller.
This angle is acute.
Acute Angle- an angle that is less than a right angle (less
than 90º).
vertex
© M. Tallman
When you line up a piece of paper with the vertex of the angle, you can see that that angle is larger.
This angle is abtuse.
Obtuse Angle- an angle that is greater than a right angle (greater
than 90º).
vertex