Use a graph paper for this question.
(Take 2 cm = 1 unit on both x and y axes)
Reflect points B(2,3), C(1,1), D(2,0) on the y-axis and write down their coordinates. Name the images as B', C', D' respectively.

Answer

To solve the problem of reflecting points B(2,3), C(1,1), and D(2,0) on the y-axis, we will follow these steps:

### Step 1: Understand the Reflection
When reflecting a point across the y-axis, the y-coordinate remains the same, while the x-coordinate changes its sign. Therefore, if a point has coordinates (x, y), its reflection will be (-x, y).

### Step 2: Identify the Coordinates of the Points
The coordinates of the points we need to reflect are:
- B(2, 3)
- C(1, 1)
- D(2, 0)

### Step 3: Reflect Each Point
Now, we will reflect each point across the y-axis:

1. **Reflect Point B(2, 3)**:
- Original coordinates: (2, 3)
- Reflected coordinates: (-2, 3)
- Therefore, B' = (-2, 3)

2. **Reflect Point C(1, 1)**:
- Original coordinates: (1, 1)
- Reflected coordinates: (-1, 1)
- Therefore, C' = (-1, 1)

3. **Reflect Point D(2, 0)**:
- Original coordinates: (2, 0)
- Reflected coordinates: (-2, 0)
- Therefore, D' = (-2, 0)

### Step 4: Write Down the Coordinates of the Reflected Points
The coordinates of the reflected points are:
- B' = (-2, 3)
- C' = (-1, 1)
- D' = (-2, 0)

### Final Answer
The coordinates of the reflected points are:
- B' = (-2, 3)
- C' = (-1, 1)
- D' = (-2, 0)

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