Angles Worksheet featuring four angle diagrams (A, B, C, D) to identify right, reflex, acute, and obtuse angles, with questions on angle types and degrees in a right angle.

Based on my analysis of the angles worksheet, I can now answer all the questions:

1. Which angle is a right angle? - B
- Diagram B shows an angle with a square symbol in the corner, which is the standard notation for a right angle (exactly 90 degrees).

2. Which angle is a reflex angle? - D
- Diagram D shows an angle that measures more than 180 degrees but less than 360 degrees. The large dashed arc goes around more than half a circle, indicating a reflex angle.

3. Which angle is an acute angle? - A
- Diagram A shows an angle that is clearly less than 90 degrees, which is the definition of an acute angle.

4. Which angle is an obtuse angle? - C
- Diagram C shows an angle that is greater than 90 degrees but less than 180 degrees, which is the definition of an obtuse angle.

5. How many degrees are there in a right angle? - 90 degrees
- By definition, a right angle always measures exactly 90 degrees.

Therefore, the completed answers are:
1. B
2. D
3. A
4. C
5. 90 degrees