Less than -79 means... Wait for it...
LESS THAN -79 :O!
89 - 10 = 79
9h + 2 < - 79 9h < - 81 h < - 9
79
2 1
As the 79o angle is less than 90o it is an acute angle.
Subtract 38 from 79: 79-38 = 41
89 - 10 = 79
It is 79 because .3 is less than .5
37 and 79
125
9h + 2 < - 79 9h < - 81 h < - 9
Acute, because it is less than 90 degrees.
79
2 1
79 + 73 = 152
As the 79o angle is less than 90o it is an acute angle.
It is easily checked by melting point of Naphthalene, if it is pure its melting point is 79 Celsius otherwise less than 79 Celsius.