Final answer:
When two objects have the same angular size, it means that they appear to be the same size when viewed from a specific distance.
Step-by-step explanation:
The term 'angular size' refers to the size of an object as perceived by the eye based on the angle it subtends from the eye. In other words, it is the size of an object as it appears to an observer. When two objects have the same angular size, it means that they appear to be the same size when viewed from a specific distance.
For example, the Sun and the Moon have nearly the same angular size in the sky, even though the Sun is much larger in diameter. This is because the Sun is also much farther away. But from Earth, they appear to be about the same size.
The formula for calculating the angular size (θ) is θ = Size of Object / Distance to Object. So, when two objects have the same angular size, it means that their sizes and distances are in proportion to each other.