Area of a circle : π * r²
4+1 = 5
π * 5² = 78.53
π * 4² = 50.27
78.53 - 50.27 = 28.26
The area of the border is 28.26 ft²
Answer:
C
Step-by-step explanation:
C is only right answer among a to d
Answer:
18 and 9
Step-by-step explanation:
Answer:
35 i<em>s answer please tell me if i am right </em>
Step-by-step explanation:
Answer:
x = 12
Step-by-step explanation:
For the middle size triangle
short leg = x
long leg = (25 - 9) = 16
ratio = x/16
For the small triangle
short leg = 9
long leg = x
ratio = 9/x
Similar triangles are proportional so
Set the ratios equal
x/16 = 9/x
Cross multiply
x² = 144
Take the square root of both sides
x = 12