Answer:
the length of c is 18.43909
Step-by-step explanation:
pythagorean therorem
 
        
             
        
        
        
Answer:
7
Step-by-step explanation:
 
        
             
        
        
        
 Should be option 1. i cant really gv an explanation tho sry :/
        
             
        
        
        
Answer:
no
Step-by-step explanation:
 
        
             
        
        
        
Answer:
16 ft²
Step-by-step explanation:
The complete question is attached.
A trapezoid is a quadrilateral (has four sides) with one a parallel base. The base angles and the diagonals of an isosceles trapezoid are equal.
The area of a trapezoid = [(sum of the parallel bases) / 2] * height of the trapezoid.
Given that the parallel bases are 3 ft and 5 ft, while the height of the trapezoid is 4 ft. Hence: 
The area of a trapezoid = [(3 + 5)/2] * 4
The area of a trapezoid = 16 ft²