Answer:
8 inch
Explanation:
Data:
let the perimeter be = 25 inch
the total lengths of the shorter sides = 
The total length of the longer sides = 
Each longer side will be = 
The length of each longer side will be 8 inch.
Answer: 1) Angular separation equals 0.0000031 degrees
2) Angular separation in arc -seconds equals 0.011156"
Explanation:
For 2 stars separated by a distance 'S' and at a distance 'D' from the earth the angular separation in radians is given

Applying values we get

Now we know that 'π' radians equals 180 degrees thus the above value in degrees shall be equal to

2)
The angular separation in arc- seconds is given by

Answer:
Constructive waves are flat and low in height and have a long wavelength.
Hope this helps