Step 1: Understanding the Concept:
We need to calculate the area of the triangle shown in the diagram.
Step 2: Key Formula or Approach:
The diagram shows a right-angled triangle, indicated by the square symbol at one of the vertices. The area of a right-angled triangle is given by:
\[ \text{Area} = \frac{1}{2} \times \text{base} \times \text{height} \]
The base and height are the lengths of the two sides that form the right angle (the legs).
Step 3: Detailed Explanation:
Column A: From the diagram, the lengths of the legs of the right-angled triangle are 3 and 4. The side with length 5 is the hypotenuse.
Using the area formula:
\[ \text{Area} = \frac{1}{2} \times 3 \times 4 \]
\[ \text{Area} = \frac{1}{2} \times 12 = 6 \]
So, the quantity in Column A is 6.
Column B: The quantity is 6.
Comparison:
Column A is 6, and Column B is 6. The two quantities are equal.
Step 4: Final Answer:
The area of the given triangle is 6, which is equal to the quantity in Column B.