Question

In Q11 to Q15, fu in the blanks:
11. Ifx and y are the prime factors, then HCF of xy and x°y is--------
12. If x, y and z are in AP, then y=-----------
13. If the coordinates of the points P, Q, R and Sare such that PQ = QR = RS = SP, the quadrilateral PQRS is a -------------.
14. In AABC and ADEF, if ZA= ZE and ZB = ZF, then is equal to----------
AC
15. The point of intersection of the lines y = 3x and x = 3y is--------------
OR
If the equation x2 - 4x +k=0 has coincident roots, then value of k, is-------------​

Answer 1

Answer:

see explanation..

Step-by-step explanation:

Ans 11 = 1

Ans 12= (x+z)/3 by property of arithmetic mean

Ans 13 =Rhombus and if diagonal are equal then it is a square

Ans 14 = question is not clear

Ans 15 = solving the equation by any method we will get the intersection point as (0,0) so they will intersect at origin

or

Ans 15 = using quadratic formula for equal roots

we get k=2