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1
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the amount of space a 3-D object can hold
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2
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the segment whose endpoints are any point on a circle or sphere and its center
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3
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the actual area of a region
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4
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a segment that helps to make up a face
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5
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the amount of space taken up in a plane by a figure
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6
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the amount of openness in an angle
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7
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2 segments, rays, or lines that form a 90 degree angle
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9
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a 2-D figure that can be folded on its segments or curved on its boundaries to form a 3-D figure
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13
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part of a circle containing its center and an arc
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14
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a union of 3 or more segments where each segment intersects 2 other segments, one at each endpoint
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16
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a zero-dimensional figure; while usually left undefined
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17
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a segment in a polygon whose endpoints are 2 nonconsecutive vertices
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