10.4.19 Find the scale factor and ratio of perimeters for a pair of similar octagons with areas 64 it? and 81 it?

Answer. first blank ; ; ; clockwise; the second blank; ///clockwise;

The 3rd one

1. which type of clouds can you always expect to signal fair weather: cirrus, stratus, or cumulus?
stratus 

2. which type of clouds can you always expect to bring precipitation: alto, nimbus, or cumulus?  
nimbus 

3. list these clouds from highest to lowest: cirrus, stratus, fog, altocumulus. 
citrus,  altocumulus, stratus, fog 

4. which type of cloud occasionally produces precipitation: stratus, short cumulus, or cirrocumulus?
short cumulus.