Math Expression: Area of a Triangle Practice Question

Given a triangle with the base of 3cm and the height of 4cm. Find the area of this triangle.

Step 1

The picture below shows the triangle with the base of 3cm and the height of 4cm.
Step 2

To calculate the area, we use the formula for the area of a triangle:
Step 3

Since the base is given as 3cm, we can substitute b with 3. Similarly, since the height is given as 4cm, we can substitute h with 3. After doing so, we can calculate for A, as shown below:
Step 4

Now, the calculated number 6 has no meaning unless we include the unit for it. Since the base is in cm, the unit for the area will be cm2. Hence:

A = 6 cm²
Step 5

Clearly, the answer is D.