Final answer:
The area of triangle HIJ is approximately 32.2 cm² (rounded to the nearest tenth of a square centimeter).
Step-by-step explanation:
The formula for calculating the area of a triangle is: Area = (1/2) x base x height.
Given that the base of triangle HIJ is 8.7 cm and the height is 7.4 cm, we can substitute these values in the formula to find the area.
Calculating, we get:
Area = (1/2) x 8.7 cm x 7.4 cm
= 32.19 cm²
Therefore, the area of triangle HIJ is approximately 32.2 cm² (rounded to the nearest tenth of a square centimeter).