the following is a conjunction
p∧q: An isosceles triangle has two congruent sides and a right angle measures 90°.
this statement is true because both p and q are true.
The following is a disjunction :
r∨s: Four points are always coplanar or A decagon has 12 sides.
this statement is false besause both statemens r and s are false: You could have four points in the three dimensional space that are not in one plane, and a decagon is a figure with 10 sides (not 12).
