##### Across

**4.**A four-sided polygon.**8.**Lines that cross at exactly one point**10.**The distance around a figure.**11.**Triangle A triangle that has one obtuse angle**12.**A segment that connects two nonadjacent vertices of a polygon.**14.**Two lines that intersect to form four right angles**17.**a triangle with all sides equal and all angles equal**19.**An eight-sided polygon.**20.**A rectangle with 4 equal sides**21.**A series of connected line segments that starts and ends at the same place and does not intersect itself anywhere in between.**22.**A six-sided polygon.

##### Down

**1.**A line segment with one endpoint at the center of a circle and the other endpoint on the circle**2.**Distance around a circle (the perimeter)**3.**Two geometric objects having the same measure.**5.**An angle that measures less than 90°**6.**A straight one-dimensional figure having no thickness and extending infinitely in both directions.**7.**the intersection point of two sides of a plane figure**9.**All its angles=180**13.**A location in space – a dot on a piece of paper**15.**An angle that measures 90°**16.**Lines in a plane that never intersect**18.**A figure formed by two line segments or rays with a common endpoint.