that is correct grammar
"Which statement is NOT correct?" is an interrogative sentence, a sentence that asks a question.The word 'NOT' is an adverb modifying the verb 'is'.
Any angular size between 0 and 90 degrees. An OBTUSE angle is one whose size is between 90 & 180 degrees. A REFLEX angle is one whose angle is between 180 & 360 degrees. NB To correct your English grammar . The question should read ' What size is an acute angle'. When the noun following the indefinite article 'a', begins with a vowel 'a,e,i,o,u'. then the indefinite article is 'an'. In this case it is 'an acute', NOT 'a acute'.
The correct angle is one which minimises the overall energy.
That is an obtuse angle.
Obtuse angle
I can't find a sentence for the angle of incidence.
A. The angle is smaller than a right angle
correct
That is an acute angle. An obtuse angle is not acute.
to tell what the angle is
The wood formed an acute angle with the wall.
Can you see the problem from my angle. Use a question mark at the end of that sentence. Answers will not let me put one there.