##### Across

**4.**To view something in relation to another.**6.**Discover exact size, amount, etc.**7.**Collection of different things.**8.**Result in addition.**10.**Detailed examination.**13.**An operations of arithmetic.**14.**Branch of math that deals with numbers.**16.**Total space taken up by a 2D shape**19.**Study of abstract math.**21.**A line with no endpoint.

##### Down

**1.**A 2D shape with no edges and corners**2.**The mathematical study of change.**3.**1/1000th of SI unit of mass.**5.**An operations of arithmetic.**9.**Branch of math that deals with data.**10.**Branch of math that involves variables.**11.**Another name for edge.**12.**Collection of facts.**15.**Brach of math that deals with triangles.**17.**Line segment joining 2 vertices in a shape.**18.**Division.**20.**Small part of circumference.