1. what is a hollow circle ?
2. what is a perfect Circle ?
3.Heron's formula

2. the collection of all points in a plane that are the same distance from a central point is called a perfect circle.

1) The hollow circle is one which is empty from inside

2) perfect circle has infinite sides and points which are at equal distance from the centre

3) Heron's formula = Root S ( s- a) (s - b) ( s - c)

marco saved more.   he saved $35 more.

step-by-step explanation:

1+2+3+4+5+6+7+8+9+10 = 55

2*10 = 20

55-20 = 35

location: point 0

step-by-step explanation:

well, -8 to 10 on a number line is 18 spaces.

1/9 of 18 is 2.

so, 4/9 of 18 must be 8.

8 spaces from -8 (a) is 0.

so, 4/9 of the way from -8 to 10 is 0!