Because they live or come from Earth - The Latin translation of Earth is Terra.
ET (Extra terrestrial)
They are called the terrestrial planets because they are similar to Earth (in fact one of them is Earth.
The terrestrial part of the earth is called the lithosphere, which includes the Earth's outermost layer of solid rock.
Terrestrial Habitat contains only land. Animals that live only on land are called terrestrial animals. Human beings also live on land.
Terrestrial planets.
Terrestrial environment
Mercury, Venus, Earth and Mars are often called terrestrial planets.
Terrestrial planet is another way of saying rocky planet. The inner rocky planets are; Mercury, Venus, Earth and Mars.
Mars is called a terrestrial planet because it shares similar characteristics with Earth, such as a solid surface, rocks, and mountains. The term "terrestrial" refers to rocky planets that are similar to Earth, not necessarily that they support life. Mars is considered terrestrial because of its composition and structure, not because it currently supports life.
Terrestrial or land environments are divided into groups called tundra, taiga, temperate deciduous forest, tropical rain
Who says they don't?There are only four terrestrial planets we have pictures of where they're more than a single pixel (if that). We don't know if extrasolar terrestrial planets have rings or not. There's no theoretical reason they COULDN'T have rings.
Angiosperms are actually land plants as they live on land hence called terrestrial plants .