Find angle sum therom

Step-by-step explanation:

we know that,

sum of all angles of triangles is equal to 180°

Then,

33° + 87° + x = 180°

x = 180° - 120°

x = 60°

Now,

we know that,

sum of all angles which lies on a straight line is equal to 180°

Then,

x + y = 180°

60° + y = 180°

y = 120°

Hence,

The value of y = [120]°

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm

Sorry i really need my points