The Guardian - Cryptic crossword No 25,044 - Jun 23 2010

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Clues Answers
Additional symbol or shape formed by 8 and 13 PLUSSIGN
An equation is never partial like this ONESIDED
Basic kinds of number, each without a point PRIMORDIAL
Bishop leading one part of church split in two BISECT
Charming female needing extra pound for rounded figure CIRCLE
Circumference of semicircle enclosing a couple PAIR
Condescend to include second arrangement of lines or shapes DESIGN
Indefinite number, in moderation, arranged as part of fraction DENOMINATOR
Like A or B, for example, or the shortest distance between them LINEAR
Lines crossing circles in harmonious combinations CHORDS
Marked centre in middle of small diameter SCORED
Moderates numbered twelve or thirteen in fifteen CENTRE
Numbers among European aristocracy COUNTS
Clues Answers
Old instrument for measuring angles in part of plane QUADRANT
Part of mathematical collection that excites us best SUBSET
Pay scale cut for French mathematician PASCAL
Playing with one kind of side in triangle OPPOSITE
Preserves volume inside conic sections, say CURVES
Prince, for example, getting 20% in statistics and arithmetic STAR
Silly clue I had for geometry master EUCLID
Sixty minutes in geometry for university qualification DEGREE
Small pieces, half of them in old parts of county HUNDREDTHS
Something computer does makes sense ADDSUP
Take part in discussions? For mathematicians, just the opposite CONVERSE
Trajectory of missile soldier shot high in air over area PARABOLA
Variable quantities, including diameter, central in geometry EQUIDISTANT