Soccer ball
an Egyptian pyramid
a split in half heart
A real life object of a quadrilateral is a windowpane.
The significance is that not everything can be expressed with whole numbers. This is especially clear in the case of measurements; a certain unit has been chosen as the standard of length (the meter); the length, width, or height of real-life objects will usually not happen to be an exact multiple of the meter (or close enough to that), so that fractions have to be used.
1 real-life meter is equal to 20 ROBLOX studs, so a real-life ROBLOXian (that is 5 studs tall) would be about 10 inches tall.
Soccer ball
an Egyptian pyramid
1k
a doghouse
A minecraft block is 1 Meter to scale in real life.
Probably a multiplication and addition symbol
It closely resembles a real-life object.
a split in half heart
A real life object of a quadrilateral is a windowpane.
Measuring a lawn Calculating the speed of a falling object
Balance and stability. The centre of mass of an object must lie within the area of the object's base otherwise the object is unstable.