Final answer:
The area of the given triangle is 21.0 cm².
Step-by-step explanation:
Using the formula for the area of a triangle, which is 1/2 × base × height, we can calculate the area of the given triangle. The base of the triangle is √63 cm and the height is √28 cm. Plugging in these values into the formula, we get:
Area = 1/2 × √63 cm × √28 cm
Area = 1/2 × 7.94 cm × 5.29 cm
Area = 21.0 cm² (rounded to one decimal place)