1. Identify acute, right, obtuse and straight angles in the previous figures.



Answer:

Group 1 (Left Box): 
Every angle is smaller than a square corner (\(<90^{\circ }\)), making them all acute angles.

Group 2: Right Angles (Middle Box)
All three shapes show perfect square corners, representing a quarter-turn (\(90^{\circ }\)).

Group 3 (Right Box): 
Every angle is wider than a square corner but smaller than a straight line (\(90^{\circ }\) to \(180^{\circ }\)), making them all obtuse angles.

2. Make a few acute angles and a few obtuse angles. Draw them in different orientations.






3. Do you know what the words acute and obtuse mean? Why do you think these words have been chosen?

Answer:

Acute means sharp. Acute angles look sharp and narrow.

Obtuse means blunt.Obtuse angles look wide and blunt.




So these names are chosen according to the shape of the angles.

4. Find out the number of acute angles in each figure below.

Answer: