See related link. The top row is usually called row 0, with just a single 1, the eleventh row in this case is 1, 11,55,165,330,462,462,330,165,55,11,1.
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The Sierpinski Triangle
depends. If you start Pascals triangle with (1) or (1,1). The fifth row with then either be (1,4,6,4,1) or (1,5,10,10,5,1). The sums of which are respectively 16 and 32.
Fibonacci lived about 400 years before Pascal did.
if the triangle is a right angle it has 2 perpendicular line segments.
perpendicular