Triangle Properties: Identifying Height vs Median in Right Triangle

Triangle Properties with Special Line Segments

Look at the triangle below.

Which side is the height and which side is the median?

AAABBBCCCDDD

❤️ Continue Your Math Journey!

We have hundreds of course questions with personalized recommendations + Account 100% premium

Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Identify both the height and the median in the given triangle
00:03 The height in the right triangle is AC
00:09 BC is also a height according to the given data, forming a right angle with the line
00:15 DC is also a height according to the given data, forming a right angle with the line
00:19 DC divides AB into two equal segments, therefore it is a median
00:23 This is the solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Look at the triangle below.

Which side is the height and which side is the median?

AAABBBCCCDDD

2

Step-by-step solution

To solve this problem, we need to analyze the roles of line segment DC in the triangle ABC:

  • Step 1: Identify if DC is a height
    A height (altitude) is a line segment from a vertex perpendicular to the opposite side. The image suggests that line DC is vertical, with apparent perpendicularity to BC due to the presence of D near the center of the triangle, making DC a plausible height.

  • Step 2: Identify if DC is the median
    A median divides the opposite side into two equal lengths, from a vertex. Without explicit symmetry in the image, but assuming graphic accuracy and typical diagram problems, DC can be a median if D is the midpoint.

  • Step 3: Confirm if DC is both a height and a median
    In instances such as isosceles or equilateral triangles, a segment can be both. Given D’s position and symmetric considerations from vertex A, it's likely DC is both here.

Thus, line segment DC is both the median and the height.

Therefore, the correct answer is DC = median and height.

3

Final Answer

DC = median and height

Key Points to Remember

Essential concepts to master this topic
  • Height Definition: A perpendicular line from vertex to opposite side
  • Median Definition: Line from vertex to midpoint of opposite side
  • Special Case: In right triangles, one segment can be both ✓

Common Mistakes

Avoid these frequent errors
  • Confusing height and median definitions
    Don't assume any line from a vertex is automatically a height or median = wrong identification! Heights must be perpendicular, medians must go to midpoints. Always check both the angle (90°) and the midpoint position to determine if a segment is height, median, or both.

Practice Quiz

Test your knowledge with interactive questions

Is DE side in one of the triangles?
AAABBBCCCDDDEEE

FAQ

Everything you need to know about this question

How can I tell if DC is perpendicular to AC?

+

Look for the small square symbol at point D in the diagram! This indicates a 90° angle, meaning DC is perpendicular to AC and therefore a height.

What makes DC a median in this triangle?

+

If point D is the midpoint of side AC, then BD is a median. In this case, since the triangle appears to be a right triangle with special properties, DC can serve as both median and height.

Can a line segment be both height and median?

+

Yes! In isosceles triangles and right triangles with special configurations, the same line can be both. This happens when the perpendicular from a vertex also hits the midpoint of the opposite side.

Why is the answer not just 'height' or just 'median'?

+

In this specific right triangle configuration, segment DC satisfies both conditions: it's perpendicular to the base (making it a height) and it connects to the midpoint (making it a median).

How do I identify these segments in any triangle?

+
  • Height: Look for perpendicular symbol (small square) at the foot
  • Median: Check if the line goes to the midpoint of the opposite side
  • Both: The line is perpendicular AND goes to the midpoint

🌟 Unlock Your Math Potential

Get unlimited access to all 18 Triangle questions, detailed video solutions, and personalized progress tracking.

📹

Unlimited Video Solutions

Step-by-step explanations for every problem

📊

Progress Analytics

Track your mastery across all topics

🚫

Ad-Free Learning

Focus on math without distractions

No credit card required • Cancel anytime

More Questions

Click on any question to see the complete solution with step-by-step explanations