diameter
Pronunciation
Noun
B1 Intermediate
Quick answer
The length of a straight line that passes through the center of a circle and touches both sides.
Usage notes
The diameter is always exactly twice the radius.
Test yourself
Which word fits the gap? "The pizza had a _____ of about thirty centimeters."
Answer: diameter
In your own words, what does "diameter" mean?
The length of a straight line that passes through the center of a circle and touches both sides.
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