Answer:
Step-by-step explanation:
Radius of outer circle = R = 9 cm
Radius of inner circle = r = 5 cm
Area of the shaded region = area of the outer circle - area of the inner circle.
= πR² - πr²
= π(R² - r²) = 3.14*(9² - 5²)
= 3.14 * (81- 25) = 3.14 * 56
= 175.84 cm²
Answer:
42 or B
Step-by-step explanation:
So the top triangle is similar to the whole triangle by AA similarity. It has a ratio of 1:2. So 4x+2:4x+44 is 1:2. So 8x+4=4x+44. Simplifying, we get 4x=40 or x=10 So 4x+2=42
The name of the shape is an octagon. Since there are 9 identical tiles and you have 72 sides, you would divide 72 by 9 and get 8. And shape that has 8 sides would be an octagon.
I think this is the answer....
False only metals are good conductors
