Find the length of a square whose diagonal is 15cm​

hope this helps

Step-by-step explanation:

To find the length of the diagonal of a square, multiply the length of one side by the square root of 2: If the length of one side is x... The diagonals of a square intersect (cross) in a 90 degree angle. This means that the diagonals of a square are perpendicular.

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads