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Crossword clues

Solve these clues to fill the grid.

The space between two lines or planes that intersect
3 Across
Drafting instrument used to draw or measure angles
6 Across
A plane rectangle with four equal sides and four right angles
7 Across
Greek philosopher and mathematician who proved the ___ theorem
9 Across
A straight line at right angles to another line
12 Across
Cutting so as to separate into pieces
14 Across
Characterized by perfect conformity to fact or truth
15 Across
A proposition deducible from basic postulates
16 Across
A place within a region identified relative to a center or reference location
1 Down
A straight line connecting any two vertices of a polygon that are not adjacent
2 Down
A word that expresses a meaning ___ to the meaning of another word
4 Down
A real number that cannot be expressed as a rational number
5 Down
The side of a right triangle opposite the right angle
8 Down
An abstract idea of that which is due to a person or governmental body by law or tradition or nature
10 Down
Any of various ___ drafting instruments used to draw straight lines at specified angles
11 Down
An integer or a fraction
13 Down

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