10, the sides are equal and one side is 10 meaning so are the other sides.
There are 3 shapes present.
Triangle - 2
Circle - 4
Square - 2
Ratio of triangles to cirles: 2 triangles to 4 circles ⇒ 2/4
2/4 simplified to 1/2.
Answer:

Step-by-step explanation:
Let 's' be the side of the original square
the length of the side of a square is doubled, so the length of the new square is 2s
Area of the original square with side length 's' is 
Area of the new square with side length '2s' is 
Area of the new square is 4 times the area of the original square
ratio of the areas of the original square to the area of the new square

Step-by-step explanation:
Diameter is 6 ft
3 ft + 3ft
Answer:
52 - 48 = 4
Around 7%
(Please tell me if this is wrong)