(Polar molecules, Non-polar molecules, etc.)
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The bond angles are less than 120 and 90, as it would be a trigonal bipyramidal without the "top" electron, so the lone pair repulsion pushes down and makes the angles slightly less than they were originally with the trigonal bipyramidal shape.
It is hard to determine the exact angle of the seesaw shape because every element differs in size and as a result, we can never determine the exact angles unless you remember the bond angles. However, in general you can consider each angles of the trigonal bipyramidal decreased as seesaw’s bond angle.
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