##### Across

**2.**a quantity obtained by multiplying quantities together, or from an analogous algebraic operation.**4.**a plane figure with four equal sides**5.**a plane figure with three straight sides and three angles**7.**linear distance around the outside of the closed curve or circular object**11.**to take a number or a amount from another to calculate the difference**12.**angle less than 90 degrees**14.**a number by which another number is to be divided.**16.**by adding the giving amount to another

##### Down

**1.**a numerical quantity that is not a whole number**3.**ascertain the size ,amount or degree of something by using an instrument**6.**the measurement or extent of something from end to end;**8.**triangle with two equal sides**9.**round plane figure**10.**a number of quantity that when multiplied with another produces a given number**13.**the numerical value of the ratio of the circumference of a circle to its diameter**15.**measure of the amount od space inside a sold figure