The answer is D from picture you posted .
A acute angle is the answer your looking for
Answer:
The length of side x is 22.91
Step-by-step explanation:
As per law of cosine

Where
degrees
a = 20
b = 27
Substituting the given values in above equation, we get -

Hence, the length of side x is 22.91
Answer:
D
Step-by-step explanation:
From the triangle inequality, we know that the two small sides must be greater than the largest side. Let's let x be the third side:

However, 15 can also be our largest side. So:

Let's solve for x for both inequalities.
First inequality:

Add:

Flip:

Second inequality:

Subtract 7 from both sides:

So, we have the compound inequality:

Combine:

Our answer is D
And we're done!