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# Why is it impossible for a triangle to contain a 180 degree angle?

Updated: 4/28/2022

Wiki User

9y ago

By definition, a triangle must have three angles. It is also known that the interior angles of a triangle must total 180 degrees. If a triangle contained a single interior angle of 180 degrees, the other angles of the supposed triangle would both have to be zero, and the supposed triangle would be a straight line.

Triangles have 3 angles.

All of the interior angles must add up to 180 degrees

If 1 of them was 180 degrees, the other 2 angles would have to equal 0 degrees, in which case, it would just be a line.

Wiki User

9y ago

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Q: Why is it impossible for a triangle to contain a 180 degree angle?
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### How is it impossible for a triangle to contain a 180 degree angle?

Because the 3 interior angles of a triangle must add up to 180 degrees and not 1 angle on its own

### Why is it impossible for a triangle to contain a 180 angle?

It is impossible to have a 180 degree angle because all three of a triangle's angles have to equal 180. If you have one angle of 180, then you would have 2 angles of 0, making a plain old straight line.

Acute

### Can a triangle contain an obtuse angle and a right angle?

No because the 3 interior angles of a triangle add up to 180 degrees

### Why is it impossible for a triangle to contain an 180 degree angle?

The sum of the three included angles of a triangle always = 180 degrees. So if one angle = 180 degrees (a straight line) then the other two included angles will be = 0 degrees which cannot make a triangle.

### Can a right equilateral triangle be made?

no, it is impossible an angle of an equilateral triangle is always 60 degrees it can't be 90 degree

### What is the thirty degree sixty and degree right triangle theorem?

If the triangle has a 30 degree angle and a 60 degree angle then the 3rd angle must be a 90 degree angle because there are 180 degrees in a triangle and so therefore it is a right angle triangle.

### Why is impossible a triangle to contain a 180 grades degree angle?

By definition, a triangle must have three angles. It is also known that the interior angles of a triangle must total 180 degrees. If a triangle contained a single interior angle of 180 degrees, the other angles of the supposed triangle would both have to be zero, and the supposed triangle would be a straight line.

### What is a a triangle with a 90 degree angle?

A right angle triangle

### Is a 100 degree triangle acute obtuse or right?

If a triangle has a 100 degree angle, it is an obtuse triangle because a 100 degree angle is an obtuse angle. angle &gt; 90 = obtuse angle = 90 = right angle &lt; 90 = acute

### How can you draw triangles using triangle law when an angle is greater than 180 degree?

You can't. All the angles in a triangle will add up to 180 degrees, therefore a triangle with one angle greater than this is impossible.

### What is a triangle with one 90 degree angle?

A right triangle is a triangle in which one angle is a right angle (that is, a 90-degree angle). The relation between the sides and angles of a right triangle is the basis for trigonometry.