All of the angles in a triangle equal 180° so if the first 2 angles are 60°, combined that equal 120°, leaving 60° left. X= 60°
Subtract 70 from 16, and you get 54.
Answer:
The answer is "Its results are not consistent with its three designs Yes. Its results show significant differences between both the three designs."
Step-by-step explanation:
Following are the distribution of preference:

An expected frequency(
) has 40 Null hypotheses to take n=120.to each design:
The effects of the three designs are standardized
Inaccurate.
Hypothesis Alternative:
The effects of the three prototypes are not uniform
Degrees Of freedom 

Chi-squared distribution critical value at
Since
value
table of
is determined.
So
is rejected.
8 x 108 = 864
4 x 102 = 408
if you subtract 864 and 408, then you get 456. so there is your answer!