15.1: Can You Draw It?
 Complete the table by drawing a triangle in each cell that has the properties listed for its column and row. If you think you cannot draw a triangle with those properties, write “impossible” in the cell.

Share your drawings with a partner. Discuss your thinking. If you disagree, work to reach an agreement.
acute (all angles acute)  right (has a right angle)  obtuse (has an obtuse angle)  

row 1  scalene (side lengths all different)  
row 2  isosceles (at least two side lengths are equal)  
row 3  equilateral (three side lengths equal) 