Question

Lisa is asked to draw a triangle with the following specifications:

Answer 1

B is correct.

Since two of the angles are complementary, adding up to 90°, the third angle must be 180-90=90°.

However, this does not mean only one triangle exists.  The only information we are given about the two angles is that they are complementary.  This could be 30 and 60; 45 and 45; or multiple other combinations.  This means there is more than one triangle that fits these criteria.