Line Symmetry Sheet 8: Complete the patterns using the two mirror lines.

To solve the problem of completing the patterns using the given mirror lines, we need to reflect the existing parts of the shapes across the mirror lines. Here's a step-by-step explanation for each pattern:

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Pattern 1: Top Left

- Given: A shape with a vertical and horizontal mirror line.
- Task: Reflect the shape across both mirror lines.

#### Steps:
1. Vertical Mirror Line Reflection:
- The shape on the left side of the vertical line is reflected to the right side.
- Each point or segment on the left is mirrored horizontally to the right.

2. Horizontal Mirror Line Reflection:
- The shape above the horizontal line is reflected below it.
- Each point or segment above the horizontal line is mirrored vertically below it.

#### Result:
- After reflecting across both lines, the completed shape will be symmetrical both vertically and horizontally.

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Pattern 2: Top Right

- Given: A shape with a vertical mirror line.
- Task: Reflect the shape across the vertical mirror line.

#### Steps:
1. Vertical Mirror Line Reflection:
- The shape on the right side of the vertical line is reflected to the left side.
- Each point or segment on the right is mirrored horizontally to the left.

#### Result:
- After reflecting across the vertical mirror line, the completed shape will be symmetrical vertically.

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Pattern 3: Bottom Left

- Given: A shape with a vertical mirror line.
- Task: Reflect the shape across the vertical mirror line.

#### Steps:
1. Vertical Mirror Line Reflection:
- The shape on the left side of the vertical line is reflected to the right side.
- Each point or segment on the left is mirrored horizontally to the right.

#### Result:
- After reflecting across the vertical mirror line, the completed shape will be symmetrical vertically.

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Pattern 4: Bottom Right

- Given: A shape with a diagonal mirror line.
- Task: Reflect the shape across the diagonal mirror line.

#### Steps:
1. Diagonal Mirror Line Reflection:
- The shape above the diagonal line is reflected below it.
- Each point or segment above the diagonal line is mirrored diagonally below it.

#### Result:
- After reflecting across the diagonal mirror line, the completed shape will be symmetrical along the diagonal.

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General Approach for Reflection:

1. Identify the mirror line(s).
2. For each point or segment in the given part of the shape:
- Measure its distance and direction from the mirror line.
- Place the corresponding point or segment on the other side of the mirror line at the same distance and orientation.
3. Connect the reflected points to complete the shape.

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Final Answer:

The completed patterns are obtained by reflecting the given parts across the specified mirror lines. Since I cannot draw the images here, the solution involves following the steps above for each pattern. If you need a visual representation, you can use graph paper and manually reflect the shapes as described.

Boxed Final Answer:
\[
\boxed{\text{Complete each pattern by reflecting across the given mirror lines.}}
\]