A bakery introduces diamond-shaped chips for a festive season, with all sides equal giving it an attractive and symmetric appearance. To ensure even baking and easy breaking, two straight cuts are marked across the biscuit from one corner to the opposite corner and from the remaining corner to its opposite corner.
 
Based on the given information solve the following questions
1. Which observation about the chips prove that it is a rhombus?
 
2. Which statement correctly explains the perpendicular intersection of the two cuts on the chips?
 
3.If one interior angle of the rhombus-shaped chips is \(100^\circ\), what is the measure of the angle next to it?
 
4. Which quadrilateral is obtained when a rhombus is reshaped so that all its angles become right angles