##### Across

**1.**The ratio of a perfect circle.**9.**Adjacent over Hypotenuse.**10.**Opposite over Adjacent/A straight line that touches a curved surface at one point.**11.**A straight line between two points in a circle across the centre.**13.**An organised collection of numbers.**14.**The study of computation of limits, derivatives, and integrals of functions of real numbers and instantaneous rates of change.**16.**A shape with four equal sides and angles.**21.**The branch of Mathematics that deals with triangles, the relationships between their sides and angles and their functions.**23.**An unending value that goes on forever.**24.**The number which indicates that there is no value or magnitude.

##### Down

**2.**The branch of Mathematics in which letters and other symbols are used to represent numbers and quantities in formulae and equations.**3.**The branch of Mathematics that deals with shapes, lines or surfaces and their properties and relations.**4.**An idea or concept that can be demonstrated using the rules of logic**5.**Hypotenuse over Adjacent.**6.**The bottom of a figure or a shape.**7.**A value expressed as an arrow, with direction and magnitude.**8.**The simplest possible ratio of the circle.**12.**A shape with three sides and tips.**14.**Adjacent over Opposite.**15.**Opposite over Hypotenuse.**17.**Hypotenuse over Opposite.**18.**A set of instructions used to solve a problem or obtain a desired result.**19.**The vertical measurement of a figure.**20.**A ratio of numbers or variables.**22.**A straight line from a point in a circle to the centre of the circle.