### Step 1: Define the Problem
Identify the relationship between two lines that intersect at a right angle.

### Step 2: Break Down the Problem
- Determine the geometric relationship between two lines intersecting at a right angle.

### Step 3: Apply Relevant Concepts
- Lines that intersect at a right angle are known as perpendicular lines.

### Step 4: Analysis, Verify and Summarize
- Perpendicular lines are defined as two lines that intersect to form a 90-degree angle.

### Final Answer
Two lines intersecting at a right angle are **perpendicular**.

Question

### Step 1: Define the Problem
Identify the relationship between two lines that intersect at a right angle.

### Step 2: Break Down the Problem
- Determine the geometric relationship between two lines intersecting at a right angle.

### Step 3: Apply Relevant Concepts
- Lines that intersect at a right angle are known as perpendicular lines.

### Step 4: Analysis, Verify and Summarize
- Perpendicular lines are defined as two lines that intersect to form a 90-degree angle.

### Final Answer
Two lines intersecting at a right angle are **perpendicular**.

Knowee AI · Accepted Answer

### Step 1: Define the Problem
Identify the relationship between two lines that intersect at a right angle.

### Step 2: Break Down the Problem
- Determine the geometric relationship between two lines intersecting at a right angle.

### Step 3: Apply Relevant Concepts
- Lines that intersect at a right angle are known as perpendicular lines.

### Step 4: Analysis, Verify and Summarize
- Perpendicular lines are defined as two lines that intersect to form a 90-degree angle.

### Final Answer
Two lines intersecting at a right angle are **perpendicular**.

Two lines intersecting at a right angle form a line. are parallel. are perpendicular. form a ray.