Math Problem Statement

In a triangle ABC, area(ΔABC) = 24 m² and E is the midpoint of median AD. Find the area of ΔBED?

Solution

To solve this problem, let’s break it down step-by-step:

  1. Understand the given information:

    • The area of triangle ΔABC\Delta ABC is 24 m2\text{m}^2.
    • ADAD is a median, meaning it divides ΔABC\Delta ABC into two equal areas. Therefore, the area of ΔABD\Delta ABD and ΔACD\Delta ACD are both 12m212 \, \text{m}^2.
    • EE is the midpoint of ADAD, dividing it into two equal segments.
  2. Key property of medians: The midpoint of a median divides the triangle into two smaller triangles of equal area. Thus, since EE is the midpoint of ADAD:

    • Area of ΔBED=12Area of ΔABD\text{Area of } \Delta BED = \frac{1}{2} \text{Area of } \Delta ABD.
  3. Calculation:

    • The area of ΔABD\Delta ABD is 12m212 \, \text{m}^2.
    • The area of ΔBED=12×12=6m2\Delta BED = \frac{1}{2} \times 12 = 6 \, \text{m}^2.

Thus, the area of ΔBED\Delta BED is 6 m2\text{m}^2.


Would you like further explanation or examples of how medians divide triangles? Here are some related questions for further exploration:

  1. How does the centroid divide a triangle into regions of equal area?
  2. What happens to the areas if EE is not the midpoint of ADAD?
  3. How do you prove mathematically that medians divide triangles into equal areas?
  4. Can this problem be solved geometrically instead of algebraically?
  5. What are the other important properties of medians in a triangle?

Tip: Always remember that the midpoint of a median divides the triangle into smaller triangles of equal area, which simplifies many area-based problems.

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Math Problem Analysis

Mathematical Concepts

Triangle Areas
Properties of Medians

Formulas

Area of smaller triangle = 1/2 × Area of larger triangle

Theorems

Median theorem: A median divides a triangle into two triangles of equal area.

Suitable Grade Level

Grades 9-10