Which biconditional statement is NOT true? a)Two lines are perpendicular if and only if they intersect to form right angles. b)A
triangle is a right triangle if and only if the lengths of its sides are related by the equation a2+b2=c2. c)A quadrilateral is a rectangle if and only if it has exactly four right angles. d)A triangle is equilateral if and only if it has three sides
A) True because perpendicular means 90˚ B) True because the a2+b2=c2 is the pythagoras theorem which ONLY works for right angled triangles C) Yes this is true D) An equilateral triangle means all angles must be 60˚. Just having three sides does not mean all angles are 60˚!
Scientist can look at foods that have bacteria or increased diseases so they can prevent future sickness in the future by observation so it improves nutrition
