Answer:
a1
Step-by-step explanation:
Just add the numerators if both fractions to get: a + 1 = a1
a+1
Well if you have the same denominator, which in this case you do, it's equal to b, you can simply add the numerators. This gives you the expression so the numerator is a+1
That is called an acute angle if it’s more than 90 degrees it’s called o tuse angle
