The two perpendicular lines theorem is based on
a. the definition of parallel lines
b. the fact that corresponding angles are congruent
c. the paradox of parallels
d. the fact that corresponding angles share a common side
i think it's b but i'm not entirely sure

Step-by-step explanation:

Given are 4 options and we have to find the base out of the given four options which form base for two perpendicular lines theorem

Option a is incorrect as the definition of parallel lines have nothing to do with perpendicular lines.

C is incorrect since paradox of parallels cannot be the basis for perpendicular lines theorem

D is incorrect as this pertains to triangles or quadrilaterals which deal with corresponding angles

The fact that adjacent angles of a linear pair are congruent form the two perpendicular lines.

Hence option B) is right.

30.5*10=350$

you have to multiply the number without the decimal point then add it later but if its tenn u must move the place value of the decimal point 1 to the right.