Answer:
The perimeter is 
Step-by-step explanation:
we know that
The perimeter of the figure is equal to the circumference of a semicircle
plus the perimeter of a square minus the diameter of the circle
so

we have



The diameter of the circle is equal to the length side of the square
substitute



Answer:
0
Step-by-step explanation:
1/3(21)-1-1/2(12)
7-1-6=6-6=0
Its not one of the choices. its 5x+16
X^2+10x+25 =8
Answer shown in figures below
Triangle HGE is congruent to Triangle FGE
Because
- GE = GE ( common side )
- Angle HEG = Angle FEG ( angular bisector )
- Angle HGE = Angle FGE ( angular bisector )
Hence HGE is congruent to FGE through ASA congruency