Write a 2-column or flowchart proof showing a rhombus is a quadrilateral

with four congruent sides. (at least 4 steps)

given: rstq is a quadrilateral

prove: rstq is a rhombus

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?