Which is a correct definition for an obtuse angle?       a. an angle with a measure that equals the measure of a square corner   b. an angle with a measure that is less than the measure of a square corner   c. an angle with a measure that is greater than the measure of a square corner   d. an angle that looks like a line

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?