Step-by-step explanation:
a. Obtuse Scalene Triangle. It has one angle that is greater than 90 degrees and have two equal sides so it's a obtuse scalene triangle.
b. A triangle interior add up to 180 degrees. We are given the upper angle which is 173. The other two angles must add to 180 but must be equal.
[tex]x + y + z = 180[/tex]
[tex]y = z[/tex]
[tex]x + z + z = 180[/tex]
[tex]x + 2z = 180[/tex]
x=173 so
[tex]173 + 2z = 180[/tex]
[tex]2z = 7[/tex]
[tex]z = 3.5[/tex]
3.5 degrees.
