Yes, the triangle is right angled.
Step-by-step explanation:
Given lengths are;
11 yards, 60 yards and 61 yards
From pythagoras theorem;
The sum of square of shorter lengths is equal to square of larger side.
Here;
a = 11 , b = 60 , c = 61

As it satisfies the condition of Pythagoras theorem, the triangle is right angled.
Yes, the triangle is right angled.
Keywords: pythagoras theorem, addition
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Answer:
True. The statement is also equivalent to: If m<B + m<C does not equal m<D, then m<A does not equal m<B and m<A + m<C is not equal to m<D.
Answer:
The direct distance between the birds is 12.64 miles.
Step-by-step explanation:
We have, one bird flew 12 miles west and another bird flew 4 miles north. It is required to find the direct distance between the birds. It means we need to find the resultant of two displacement. It can be given by :

So, the direct distance between the birds is 12.64 miles.