Answer:
The triangle is a right triangle since its a 90 degree triangle
Step-by-step explanation:
30+60=90
Answer:
c
Step-by-step explanation:
A number that can be written as a decimal that neither repeats nor terminates.
Answer:
False anything over the halfway point or .5 would be rounded to the number above in this case 1.682 would be rounded to 2.

via the angle sum formula of sin


which proves the second choice
the third choice is wrong since for x=0,y=0 it will show that 2=1 which is incorrect
for the fourth one you can do some thing similar to choice one just expand the sum formula of sin and that should be true too
so
the first , the second and the fourth are all true