Englishfor English speakers
radius
Noun
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A radius is a straight line between the centre of a circle and its circumference.
To find the area of a circle, you have to know the length of the radius.
of
Preposition
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Made using.
It is a house of cards.
curve
Noun
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A curve is a line that is not straight. It is like part of a circle. It starts in one direction and turns.
The edge of the flower petal is a beautiful curve.
curve
Verb
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To move in a curve.
The car curved around the corner.
This piece of wood is not good. It is curved.