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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

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ayfat23

The biconditional statement that is not true is A triangle is equilateral if and only if it has three sides.

What is equilateral triangle?

Equilateral triangle can be regarded as type of triangle that it's three sides equal.

It should be noted that Equilateral triangle are referred to as regular triangle and it must have equal length.

Learn more about Equilateral triangle at;

https://brainly.com/question/1441594

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