Consider the terms pyramid, line, square, and triangle. the term is not defined in euclidean geometry

Option a) pyramid

Step-by-step explanation:

We are given the terms as pyramid, line, square, and triangle.

Line is defined in Euclid geometry as the shortest distance between two points.

A square is a closed figure with straight lines with equal lengths and equal angles as sides.

Triangle is a closed figure with three lines as sides and hence defined as Euclid geometry

So correct answer is option a) pyramid

a and c

for infinitely many solutions we require both left and right sides to be equal

distribute and simplify

a

14 - 8x = 20 - 8x - 6 = 14 - 8x ← both sides equal so infinite solutions

b

6x - 54 = 6x - 54 + x = 7x - 54 ← not equal

c

4x + 16 = 4x + 10 + 6 = 4x + 16 ← both sides equal so infinite solutions

d

5x - 40 + 10 = 5x + 10

5x - 30 = 5x + 10 ← not equal