Complex sentence: The larger the angles the less strength the shape will have because there would be too much space inside the shape but if the angles are too small strength is lost because of the shape is too close together that there is no space for the structure to hold.
Split into simpler sentences: The larger the angles, the less strength the shape will have because there would be too much space inside the shape. However, if the angles are too small, strength is lost because of the shape is too close together, so there is no space for the structure to hold.