The task is to identify which of the four diagrams correctly represents an angle of 90 degrees (a right angle).
- Diagram (a) shows an angle that is clearly greater than 90 degrees; it is an obtuse angle.
- Diagram (b) shows an angle that is less than 90 degrees; it is an acute angle.
- Diagram (c) shows an angle that is also less than 90 degrees; it is an acute angle.
- Diagram (d) shows two lines intersecting perpendicularly, forming a 90-degree angle. The arc symbol at the vertex confirms this is the angle being measured, and its shape is consistent with a right angle.
Therefore, the correct diagram is (d).
Parent Tip: Review the logic above to help your child master the concept of reflex angle worksheet.
