C = πd
C = πr2
I'm not sure of the 3rd one (if there even is one), sorry
It is a curved line that forms part of the circumference of a circle.
If it is a sector of a circle then the arc is the curved part of the circle which forms a boundary of the sector.
"Formula" is singular; the plural forms is formulae or formulas.
track
Finding the perimeter of a polygon is finding how far it is in total along all the edges of the polygon; whereas finding the area of a polygon is finding how much space the polygon covers. The perimeter of a polygon forms the boundary around the area of the polygon.
It is a curved line that forms part of the circumference of a circle.
Yes. The perpendicular bisector of a chord forms a radius when extended to the centre of the circle and a diameter when extended beyond the centre to the opposite point on the circumference.
Every line of longitude forms a great circle.
The Circle of Willis.
The formula for the compound that forms is know as barium nitrate. It has a formula of: Ba(No3)2.
Ellipses.
A circle.
The Antarctic Circle
Fl is not the symbol for any element. The compound that forms between Mg and F has the formula MgF2.
If it is a sector of a circle then the arc is the curved part of the circle which forms a boundary of the sector.
"Formula" is singular; the plural forms is formulae or formulas.
To 30 decimal places: 3.14159 26535 89793 23846 26433 83279 (9 is the 30th DECIMAL place but the 31st NUMBER)