The sum of all three angles in any triangle is always 180 degrees. So in obtuse triangle there is only one obtuse angle (more than 90 degrees). If we have for example an obtuse angle of 91 degrees, then two other angles have to fit in 89 degrees which makes it impossible for any of them to be obtuse.
For this case we must find the product of two mixed numbers:

So, we have:

If we go to a mixed number we have:

Answer:

Answer:
the answer would be a because 42÷6=7 and 42÷3=14.
Identify the angle variable to use.
Write an equation.
Solve the equation for the variable.
Find the unknown angle measure.