2/9 is an irrational number because it is not a real number
If you divide it becomes a repeating decimal which is not rational
A^2 = b^2 + c^2 - 2bc cos a
= 11^2 + 5^2 - 2*5*11 cos 40
= 7.86 to 2 DP's
to find the remaining angles use the sine rule:-
a / sin A = b / sin B so
7.857/ sin 40 = 11 / sin B
sin B = 11 sin40 / 7.857 = 0.8999
<B = 64 degrees
so <C = 180 - 64-40 = 76 degrees
70/10= 7
So,
77/10-70/10= 7/10
You need to subtract 7/10 from 77/10 to make 7.
I hope this helps!
~kaikers
Answer:
36 times pie
Step-by-step explanation:
