A designer makes a book cover where the top and bottom edges are slanted in opposite directions. This gives the cover the shape of a parallelogram, which looks neat and stays stable because opposite sides are parallel.
Based on the given information solve the following questions:
1. Even with slanted edges, the book cover does not tilt or collapse. Which geometric property explains this stability?
2.If the designer continues the slanted top edge further, which side of the book cover will stay parallel
3.The designer draws both diagonals of the book cover.What is always true about how they intersect?
4. The designer measures one interior angle of the parallelogram-shaped book cover and finds it to be \(70^\circ\). What is the measure of the adjacent angle?