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Your answers we equal to 22
The biggest side is always the opposite of the biggest angle in the triangle. So angles in a triangle always go with proportion to the side they are facing.
Hope this helps :)
Answer

To prove


= 0.54


= 0.5

= 1.00
Now we find out the mid point of the 0.5 and 1.00 .

(Mid point is the point lies middle of a line segment .)
Mid point = 0.75
Thus

This shows o.54 lies between 0.5 and 1.00
This means 0.54 lies right to 0.5 and left from 1.00 .
Therefore

Five cubes.
Three with two adjoining it