Q. State fundamental theorem of arithmetic. Is it possible for HCF and LCM  of two numbers to be 18, 378. Justify ​your answer.
Q. $Cos \theta = \frac{\sqrt{4-x^2}}{2}$, then find the value of sec$\theta$.tan$\theta$.cosec$\theta$.cot$\theta$
Q. Parallel side of trapezium is 3 cm & 9 cm. The non-parallel side are 4 cm and 6 cm. A line parallel to base divides trapezium of equal perimeter. Find ratio in which each of non-parallel side is divided. 
Q. In fig $\angle$PRQ = 120$°$, than prove OR = PR +RQ.

Q. In fig. PT is a tangent. $\angle$QPT = 60$°$. find $\angle$PRQ