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Grade 4 - Mathematics
2.3 Types of Angles
When two rays meet at a point called vertex an angle is formed.
An angle that measures 90 degrees is called right angle.
An angle that measures less than 90 degrees is called acute angle.
An angle that measures more than 90 degrees is called obtuse angle.
Answer the following questions. Also draw right angle, acute angle, obtuse angle and name the rays, angles and vertex.
: What do you call an angle that forms a square corner?
: An angle that is less than a right angle is
a right angle
: The angle WXY is an acute angle.
: The point X in the figure is called the ______
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