Final answer:
To calculate the radius, circumference, and area of a circle, one would use the formulas 2πr for circumference and πr² for area, using 3.14 for π. The question does not provide the radius length, but assuming it's given, these formulas can be applied. Significant figures should also be considered in reporting the final answer.
Step-by-step explanation:
The student is asking to find the length of the radius, the circumference, and the area of a circle using 3.14 for π (pi). However, the length of the radius is not given in the question. Assuming that a radius length is provided, I can explain how to calculate each of the requested values. The circumference of a circle is calculated using the formula 2πr, where 'r' is the radius. The area of a circle is calculated with the formula πr². If a radius is given as 'r' cm, then the circumference would be 2πr cm and the area would be πr² cm².
For example, if the radius was 1.2 m, the circumference would be 2 × 3.14 × 1.2 m, and the area would be 3.14 × (1.2 m)². However, when adhering to significant figures, if the radius is given to two significant figures, then the area should be reported to two significant figures as well, which would be 4.5 m² in this example.
Remember to use consistent units and adhere to significant figures when performing your calculations.