The area of a kite is 120cm2. The length of one diagonal is 20cm. What is the length of the other diagonal?

12cm

Step-by-step explanation:

The area of a kite is the product of the diagonals divided by 2:

A = (d1 * d2)/2

You can substitute what we have:

120 = (20 * d2)/2

And solve.

240 = 20 * d2

d2 = 12cm

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.