Answer:
Plain and lemon holder
Step-by-step explanation:
The question that problem is asking is basically, what are the sizes of the dishes, and are any congruent to one another. The size of a circle can be calculated by using the formula for circumference:
C = πd
So first off, the plain dish already gives you the formula, so all you need to do is multiply 3.14 by 18:
3.14 · 18
= 56.52
Now the Porcelain dish. It gives you the information that it is "16 cm across," meaning that it has a diameter of 16, so you can plug this number into the formula:
C = π(16)
C = 50.24
Finally, we have the lemon holder. It gives you the information that it is "9 cm from the center to the edge," meaning that 9 cm is the radius, which is half of the diameter. So before you plug this number into the formula, you must multiply 9 by 2:
9 · 2 = 18
C = πd
C = π(18)
C = 56.52
Comparing the sizes, you can see that the plain dish and the lemon holder both have the same total outcome.
