Answer: 15 cm²
Step-by-step explanation: To find the area of a triangle, start with the formula for the area of a triangle which is shown below.

In this triangle, the base is 6 centimeters and the height is 5 centimeters. Now, plugging into the formula, we have
.
Now, it doesn't matter which order we multiply.
So we can begin by multiplying 1/2 times 6 cm and notice that the 2 in 1/2 and the 6 cross cancel to 1 and 3. So we're left with 3 cm.
Now, (3 cm)(5cm) is 15 cm².
So the area of the triangle is 15 cm².