The circumference of a planet is the distance round their widest part. On earth, it is measured round the equator.
All except the inner two.
No. All planets are spherical.
All of the inner planets are rocky planets: Mars, Earth, Venus, and Mercury
their all gas planets
all planets.
It is the planet's diameter multiplied by pi
The ratio of all lengths is the same. The ratio of the circumferences = ratio of the radii = 2:3
The perimeter of a circle
An arc
They are circumferences
Ratio of circumference is π : 4π = 1 : 4 This is the ratio of all lengths, therefore their radii are in the ratio of 1:4 also. Ratio of areas is the square of the ratio of length → ratio of their areas is 1² : 4² = 1 : 16
The quarter dollar, the half dollar and all dollar coins.
The answers depend on what you want to "do" and what information you have.
They are its circumferences
All planets have a core.
Only one.
d = 9.55 cm