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Classify Triangles by Angles

Triangles can be classified on the basis of angles as follows:

 

Acute triangle

Acute

All three angles are less than 90°

Right triangle

Right

One angle is exactly 90°

Obtuse triangle

Obtuse

One angle is more than 90°




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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Help

The correct answer is

Remember :

The smallest number is the one that comes first while counting.

Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.