Everything Geometry
The Basics| Classifying Quadrilaterals | Classifying Triangles
Area & Perimeter | Angles | Circles
Obtuse Angles
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Obtuse Angles Definition Review Quick Quiz
Students should be able to: identify and describe the relative size of acute, obtuse and straight angles with respect to right angles.
Students should be able to:
An obtuse angle is one that rotates more than 90º but less than 180º.
Click the button below the angle to make the ray rotate to show the how big an obtuse angle can be.
Use this mini-movie on your SMARTBoard
An obtuse angle has a measure greater than 90º.
Quick Quiz
Which angle below is NOT an obtuse angle? (click the button under the correct answer)
More angles:
Angles Home Right Angles Acute Angles Obtuse Angles
Everything Geometry The Basics| Classifying Quadrilaterals | Classifying Triangles Area & Perimeter | Angles | Circles
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