Why did the gothic master builders use geometric lines and patterns in their designs?
a they believed that geometrical relationships symbolized the divine order of the universe.
b. they believed that geometrical lines would direct the worshipper's gaze to the vaults.
c they believed that geometrical patterns made the structure more imposing.

"Gothic master builders" use "geometric lines" and "patterns" in their designs because "they believed that geometrical relationships symbolized the divine order of the universe".

Option: A

Explanation:

Gothic architecture originated from Romanesque architecture and in France. During high and late Middle Ages it was developed in Europe. This kind of architecture is popular in sky-high churches and cathedrals by utilizing rib vault and flying buttress. This was most active during 12th to 16th century and the very first and important example is “Basilica of Saint-Denis”. The construction design is beautiful glimpse of divine universe and sky touching tips is the center of attraction in such design which is imagined as ladder to God.