Complex sentence: The carbon atoms in cycloalkanes are "sp" 3 hybridized and therefore a deviation from the ideal tetrahedral bond angles of 109.47 degrees causes an increase in potential energy and an overall destabilizing effect.
Split into simpler sentences: The carbon atoms in cycloalkanes are "sp" 3 hybridized and are therefore a deviation from the ideal tetrahedral bond angles of 109.47 degrees. This causes an increase in potential energy and an overall destabilizing effect.