Question

diego measured the diameter and circumference of several circular objects and recorded his meas

a. one of his measurements is inaccurate. which measurement is it? flying disc
b. complete the statement to explain how you know.
the measurement should be about three times the select choice
select choice
diameter
radius

Explanation:

Step1: Recall the formula for circumference

The formula for the circumference \(C\) of a circle is \(C=\pi d\), where \(d\) is the diameter and \(\pi\approx3.14\). So the circumference is approximately \(3\) times the diameter.

Step2: Check each object

• For the Half - Dollar Coin: \(d = 3\) cm, and \(C\approx3\times3=9\) cm (actual \(C = 10\) cm, close).
• For the Flying Disc: \(d = 23\) cm, and \(C\approx3\times23 = 69\) cm (actual \(C = 28\) cm, not close).
• For the Jar Lid: \(d = 8\) cm, and \(C\approx3\times8=24\) cm (actual \(C = 25\) cm, close).
• For the Flower Pot: \(d = 15\) cm, and \(C\approx3\times15 = 45\) cm (actual \(C = 48\) cm, close).

Answer:

The measurement should be about three times the diameter.