▁trig onal ▁plan ar ▁shapes ▁but ▁similar ▁to ▁the ▁t etra hed ral ▁orientation , ▁py ram idal ▁shapes ▁require ▁three ▁dimensions ▁in ▁order ▁to ▁fully ▁separate ▁the ▁electrons . ▁ ▁Here , ▁there ▁are ▁only ▁three ▁pairs ▁of ▁bond ed ▁electrons , ▁leaving ▁one ▁un shared ▁l one ▁pair . ▁L one ▁pair ▁– ▁bond ▁pair ▁rep uls ions ▁change ▁the ▁bond ▁angle ▁from ▁the ▁t etra hed ral ▁angle ▁to ▁a ▁slightly ▁lower ▁value . ▁For ▁example , ▁am mon ia ▁( N H 3 ). ▁ ▁V SE PR ▁table ▁ ▁The ▁bond ▁angles ▁in ▁the ▁table ▁below ▁are ▁ideal ▁angles ▁from ▁the ▁simple ▁V SE PR ▁theory , ▁followed ▁by ▁the ▁actual ▁angle ▁for ▁the ▁example ▁given ▁in ▁the ▁following ▁column ▁where ▁this ▁diff ers . ▁For ▁many ▁cases , ▁such ▁as ▁trig onal ▁py ram idal ▁and ▁bent , ▁the ▁actual ▁angle ▁for ▁the ▁example ▁diff ers ▁from ▁the ▁ideal ▁angle , ▁and ▁examples ▁differ ▁by ▁different ▁amounts . ▁For ▁example , ▁the ▁angle ▁in ▁H 2 S ▁( 9 2 ° ) ▁diff ers ▁from ▁the ▁t etra hed ral ▁angle ▁by ▁much ▁more ▁than ▁the ▁angle ▁for ▁H 2 O ▁( 1 0 4 . 4 8 ° ) ▁does . ▁▁ 3 D ▁representations ▁ ▁Line ▁or ▁stick ▁– ▁atomic ▁nuc lei ▁are ▁not ▁represented , ▁just ▁the ▁b onds ▁as ▁st icks ▁or ▁lines . ▁As ▁in ▁ 2 D ▁mole cular ▁structures ▁of ▁this ▁type , ▁atoms ▁are ▁imp lied ▁at ▁each ▁vertex