Answer: 
Step-by-step explanation:
Equilateral triangle has equal sides, let the side be  , then the perimeter is
 , then the perimeter is 
Therefore:



To find the altitude , we will apply Pythagoras theorem , that is 

Therefore:



take the square root of both sides

 
        
             
        
        
        
The third angle is obtuse.
Since the shape has 3 sides, then the total measure of degrees is (n-2)180 = (3-2)180 = 180°.
So our equation would be
180° = 35° + 30° + x°
x = 115°
115 is greater than 90, so the angle is obtuse.
        
                    
             
        
        
        
Answer:
no
Step-by-step explanation:
on the first equation there are two Xs
 
        
             
        
        
        
$6469.177 
I could be wrong but I'm pretty sure that is right.
        
             
        
        
        
Answer:
The answer is D.
Step-by-step explanation:
In similarity, the triangles have the same angles but different length of sides.
(Correct me if I am wrong)