Finding the number of triangles with a SSA triangle given angle a, side a, and side b

Solve the triangle completely and determine how many triangles there are:

Given: angle a equals 41.2 degrees side a equals 8.1 side b equals 10.6

I worked out this triangle and got:

---angle c=79.3 degrees

---angle b=59.5 degrees

---c=12.1

---# of triangles 2

the second triangle

---angle b=120.5 degrees

---angle c=18.3 degrees

---c=3.9

I got the second triangle because for an SSA example having side a

**8.1** side b **10.6** and angle a **41.2**

1. find h=bsinangleA if h>a there is no triangle

h=10.6sin41.2=6.98 6.98 is not > 8.1 so there must be a triangle

2. if h=a there is one right triangle angle b is 90 degrees and side b

is hypotenuse solve using right angle trig

6.98 is not equal to 8.1

3. if h<a<b there are 2 triangles this one is correct 6.98<8.1<10.6 one with angle b acute and one with

angle b obtuse. find the acute b using law of sines. law of sines sin41.2/8.1 = sinB/10.6 --- sinB=10.6sin41.2/8.1 angle B=59.5 59.5 cannot be the acute angle because angle a is 41.2 degrees so what am I doing wrong... subtract it from

180 degrees to get the obtuse angle b. in each of the two triangles

find angle y using angle y=180 degrees-angle a-angle b and side c using

law of sines

4 if a is greater than or equal to b there is only one triangle and

angle b is acute (angle a or angle y might be obtuse) find angle b

using law of sines then find angle y using y=180-angle a-angle b. find

c using law of sines

6.98 is not > or = 8.1

The issue is that angle b is supposed to be an acute angle but it is not because it is 59.5 degrees while angle a is 41.2 degrees. What did I do wrong?