Question 886177
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Answer: four

1. The vertex angle is 80°.  The two base angles are 50° each.
   A. the 8 cm side is one of the two sides of equal measure.
   B. the 8 cm side is the base. 

2. One of the base angles is 80°.  The other base angle is 80° and the vertex
   angle is 20°.
   A. the 8 cm side is one of the two sides of equal measure.
   B. the 8 cm side is the base. 
 
Edwin</pre>