# Does this make sense? Is it a contradiction? If a triangle has 2 sides, then it wouldn’t be a triangle

So from a common-sense standpoint your sentence would simply be nonsensical, but still not a contradiction. “If a triangle has 2 sides, then it would be a triangle” is true. Two sides/segments define a triangle.

In logic and mathematics, proof by contradiction is a form of proof that establishes the truth or the validity of a proposition, by showing that assuming the proposition to be false leads to a contradiction.

## Can a triangle have 4 sides?

this is because when connecting the 3rd line to form the shape you create an “inside”. so you could say a triangle has 2 sides, an “outside” and “inside” or you could say 4 sides, an “inside” and 3 “outside facings” or 6 sides 3 “outside facings” and 3 “inside facings”.

A logical contradiction is the conjunction of a statement S and its denial not-S. In logic, it is a fundamental law- the law of non contradiction- that a statement and its denial cannot both be true at the same time. Here are some simple examples of contradictions. 1. I love you and I don’t love you.

## What the angles in a triangle add up to?

The angles in the triangle you drew all add up to 180°.

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## Do triangles add up to 180?

Angles in a triangle sum to 180° proof.

## How many angles Can a triangle have?

three angles

If a triangle is neither isosceles nor right, we will call it a generic triangle. A piece of trivia that is true for all triangles: The sum of the three angles of any triangle is equal to 180 degrees.

## How do I find an angle of a triangle?

How To Find The Angle of a Triangle

1. Subtract the two known angles from 180° .
2. Plug the two angles into the formula and use algebra: a + b + c = 180°

## What angles add up to 360?

Because there are 2 triangles in a square

The interior angles in a triangle add up to 180° … … and for the square they add up to 360° … …

## How many sides an octagon have?

8 sides

An octagon is a polygon made up of 8 sides. It has eight angles. Octagon = Octa + gon where octa means eight and gon means sides. There are 20 diagonals in an octagon as shown below.

## How many angles does a Nonagon have?

9 angles

A nonagon consists of 9 angles. The sum of angles of a nonagon is 1260°.

## Does supplementary mean 180?

Two angles are called supplementary when their measures add up to 180 degrees.

## What does complementary mean in geometry?

Definition of complementary angles

mathematics. : two angles that add up to 90 degrees.

## What is the relationship between ∠ A and ∠ B?

Answer: the relation between the angle a and angle b is vertically opposite angle. remember we know that , vertically opposite angle are always equal.