Oscars Triangle Maths work

In maths we are learning to use a protractor and measure Triangles.We had to cut out Triangles and the number 1,2,3 then we would put letters on the corner  

Angle	Triangle 1	Triangle 2	Triangle 3
A	90	50	47
B	70	50	74
C	20	80	55
Total	180	180	176