What is 12:45 in 12- hour clock

1245 a.m. is 0045 and 12:45 p.m. is 1245

Step-by-step explanation:

Midnight starts with 0000 and each hour until 1 p.m. starts with the actual hour number; 1 p.m. starts with 1300 and each hour thereafter adds another 100 (2 p.m. is 1400 etc.) with it ending at 2359 one minute before midnight.

10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.