In short, if i practice Vipassana meditation does it means i practice Satipatthana?
Satipatthana is the name of the actual practice, and Vipassana is the name of the quality of clearly seeing reality which Satipatthana produces.
Vipassana itself is True Awareness, clear-seeing presence in the moment absent of wandering thoughts. There is no Awakening without some success in Vipassana practice. Continued Vipassana practice aka True Awareness, results in Complete Enlightenment. Buddhism is really that simple and that's why the Buddha said "Mindfulness is liberation"!
Satipatthana is merely a pathway (or meditation method) for Vipassana training. Another pathway would be Anapanasati (breathing meditation). These are the two best paths and have sutras and many commentaries worth reading explaining how to construct that pathway.
In reality though all paths are the same and you will understand this after developing fluency over how to practice various meditation methods.
satipatthana = vipassana.
Vipassana is the meditation practice that follows the teachings of the Satipatthana Sutta (MN 22).
Yes, it is. Buddha first taught Vipassana meditation just after delivering Dhammacakkappavattana Sutta, when setting the Wheel of Dhamma in motion, to Pañcavaggiyas (five disciples - Kondanna, Bhaddiya, Vappa, Mahanama and Assaji).
Later Buddha delivered Satipatthana how to practice Vipassana in details.