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What is a counter example for the statement congruent angles are always vertical angles?
Vertical angles must necessarily be congruent, however congruent angles do not necessarily have to be vertical angles.
An example of congruent angles which are not vertical angles are the 3 interior angles of an equilateral triangle. These angles do not share the same vertex yet they are congruent.
What else can I help you with?
What is a counterexample of All rectangles have two lines of symmetry?
Since the statement does not say that they have exactly two lines of symmetry, I do not believe that there is a counter example.
What is an example of a vertical line?
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An example which proves a conjecture false?
Counter Example
Is it true that if you took an if-then statement inserted a not in each clause and reversed the clauses the new statement would also be true?
If the conditional (if, then) is true, then the contrapositive (reversed; if not, then not) will be also true. And vice versa, if the conditional is false, its contrapositive will be also false. for example,If a graph passes the vertical line test, then it is a graph of a function. (True)If a graph is not a graph of a function, then it will not pass the vertical line test. (True)Yes, but only if the original if-then was true.
Are obtuse angles congruent?
Learn the definitions. Any angle greater than 90º is obtuse. Two angles are congruent if and only if they are equal. For example, 105º ≠ 150º, but both are greater than 90º; therefore, they are not congruent. Obtuse, fersure!
An example that proves that a conjecture or statement is false?
Counter-example
What is the if-then form of A counter example invalidates a statement?
You figure it out!
Does every statement have a counter example?
Only some statements have both examples and counter examples. A sufficiently clear and unambiguous statement would not have counter examples.
What is a statement that shows conjecture is false?
A counter example is a statement that shows conjecture is false.
An example used to show that a given statement is not always true?
counter example
What does a polygon with all congruent sides is regular mean?
It means that the person writing the statement does not fully understand what "regular" means.A polygon is regular if, and only if, all its sides are congruent andall its angles are congruent.A rhombus, for example, has all its sides congruent but a rhombus is not a regular quadrilateral.It means that the person writing the statement does not fully understand what "regular" means.A polygon is regular if, and only if, all its sides are congruent andall its angles are congruent.A rhombus, for example, has all its sides congruent but a rhombus is not a regular quadrilateral.It means that the person writing the statement does not fully understand what "regular" means.A polygon is regular if, and only if, all its sides are congruent andall its angles are congruent.A rhombus, for example, has all its sides congruent but a rhombus is not a regular quadrilateral.It means that the person writing the statement does not fully understand what "regular" means.A polygon is regular if, and only if, all its sides are congruent andall its angles are congruent.A rhombus, for example, has all its sides congruent but a rhombus is not a regular quadrilateral.
What is counter example?
A counter example is a proof of a negation of a universal statement.A statement of the form "all X are Y" (e.g. all men are mortal), can be disproved by providing a counter example (here: something (someone) which is both a man and immortal).A more mathematical example of the use of a counter example could be to disprove the statement "the product of two prime numbers is odd". This is a claim about all numbers which are the product of two prime numbers (all elements in the set {n in N | n = p*q where p and q are prime numbers}). This set contains infinitely many pair numbers, but a single example (or witness), is enough to disprove the statement. Four is such a number and can serve as a counter example.
One way to show that a statement is NOT a good definition is to find a?
to find a counterexample
What is a congruent angle?
Congruent angles are of the same size as for example 85 degrees is congruent to 85 degrees
All quadrilaterals with 4 right angles are squares. Which shape is a counter example to this statement?
A rectangle with dimensions of 1" x 2" .
Can figures have congruent angles but not be congruent figures?
The lengths of the sides need not be congruent. For example, consider a square and a rectangle.
What is a counterexample of All rectangles have two lines of symmetry?
Since the statement does not say that they have exactly two lines of symmetry, I do not believe that there is a counter example.
