What is the measure of (i) a right angle ?
(ii) a straight angle ?

Answer

To answer the question about the measures of a right angle and a straight angle, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding Right Angles**:
- A right angle is formed when two lines intersect to create an angle of 90 degrees.
- This can be visualized as one line being vertical and the other being horizontal, creating a corner similar to the corner of a square.

**Measure of a Right Angle**:
- A right angle measures **90 degrees**.

2. **Understanding Straight Angles**:
- A straight angle is formed when two lines are aligned in a straight line, creating an angle of 180 degrees.
- This means that if you were to draw a line and then extend it in both directions, the angle formed is a straight angle.

**Measure of a Straight Angle**:
- A straight angle measures **180 degrees**.

### Final Answers:
- (i) The measure of a right angle is **90 degrees**.
- (ii) The measure of a straight angle is **180 degrees**.

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