Two Vertices Of A Triangle Have An Obtuse Exterior Angle?

An obtuse-angled triangle is a type of triangle with one interior angle measuring more than 90° degrees. The sum of the angles (95 + 30 + 55) is 180 degrees, and the exterior angle of a triangle is equal to the sum of the opposite interior angles. Every triangle has six exterior angles, and the sum of all the exterior angles is 360°.

The Exterior Angle theorem states that an exterior angle is equal to the addition of two Δ angles not right next to it. In this case, 140º = 60º + 80º; 120º = 80º + 40º; 100º = 60º + 40º. An exterior angle is supplementary to its adjacent Δ angle, and 140º is supported.

The interior angles of a triangle always add up to 180°, while the exterior angles are equal to the sum of the two interior angles that are not adjacent to it. To calculate the exterior angle of a triangle, enter one, two, or three angles, and use a math article to identify whether your triangle is obtuse.

There is no type of triangle that can have obtuse exterior angles at two vertices, as this would imply having two acute angles. If you add two obtuse angles, the total will exceed 180 degrees, so you cannot have two obtuse angles in a triangle. In this case, the interior angle of the triangle is two acute angles and an obtuse angle, so the exterior angle is with two obtuse angles.

A right triangle always has obtuse exterior angles at two vertices, but an obtuse triangle always has only one vertex with an acute exterior angle.


📹 Angles of Triangle: Sum of Interior Angles and Exterior Angle Theorem by @MathTeacherGon

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Can a triangle have a two-obtuse angle?

It is not possible for a triangle to have two obtuse angles, as the sum of the angles in question is 180°. The sum of any two obtuse angles and an acute angle exceeds 180°.

What is the condition of an obtuse angle triangle?

An obtuse-angled triangle is a shape where one of its interior angles exceeds 90° degrees. If one angle exceeds 90°, the sum of the remaining two angles must be less than 90°. An example of an obtuse-angled triangle is the triangle XYZ with an obtuse angle at Y, with the other two angles less than 90°. This triangle’s obtuse angle is also seen in a cloth-hanger with a hook attached at the top.

What is a triangle with an obtuse angle?
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What is a triangle with an obtuse angle?

An obtuse-angled triangle is a triangle with one interior angle greater than 90°, with one of its vertex angles as obtuse and other angles as acute. It can be a scalene triangle or isosceles triangle, but not an equilateral triangle. The circumcenter and orthocenter are outside the triangle, while the centroid and incenter are inside.

One obtuse-angle and one right-angle cannot be combined in a triangle, as the right triangle has one 90° angle and the other two angles are acute. Additionally, no Euclidean triangle can have two obtuse angles, as the sum of the angles must be 180°, and no Euclidean triangle can have more than one obtuse angle.

Is an exterior angle of a triangle an obtuse angle?
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Is an exterior angle of a triangle an obtuse angle?

The exterior angles of a triangle may not always be obtuse, but the sum of all three exterior angles should always be 360°. For example, if two exterior angles are 165° and 141°, the third angle is 54°.

Equilateral triangles have a measure of 120°, with each interior angle being 60°, and the sum of the interior angles being 180°. The exterior and interior angles form a linear pair, resulting in a sum of 180°.

The exterior angle theorem states that the measure of an exterior angle is equal to the sum of the interior opposite angles (remote interior angles). If the exterior angle of a triangle is known, the value of the exterior angle will be the sum of those two interior opposite angles. This helps in finding the value of the exterior angle in a triangle.

Can you have a triangle with two obtuse exterior angles?

It is not possible to form a triangle with two obtuse angles, as a right angle is defined as measuring exactly 90 degrees, and a triangle is therefore unable to contain two obtuse angles.

Why can a triangle have only one obtuse angle?

The sum of the angles of a triangle is always equal to 180°, therefore a triangle cannot have more than one obtuse angle.

How to tell if a triangle is right, acute, or obtuse?

A triangle is classified as acute if the sum of the squares of its two shorter sides is greater than the square of its longest side, and as obtuse if the sum of the squares of its two shorter sides is less than the square of its longest side.

Is it possible to have a triangle with an obtuse angle?

An acute triangle has three acute angles less than 90°, while an obtuse triangle has one obtuse angle greater than 90° and two acute angles. In Euclidean geometry, no triangle can have more than one obtuse angle. Acute and obtuse triangles are two types of oblique triangles, not right triangles due to their lack of right angles. The centroid and incenter are in the interior of all triangles, while the orthocenter and circumcenter are in an acute triangle’s interior and exterior to an obtuse triangle.

Can a triangle have 1 obtuse angle?

In a triangle, only one obtuse angle can exist; if there are more than one, the sum of two obtuse angles is necessarily less than 180°.

Why a triangle Cannot have an obtuse acute and a right exterior angle?

It is not possible for a triangle to have three exterior angles that are obtuse, acute, and right, respectively, because the adjacent angle must be right, which would result in the sum of the three angles exceeding 180 degrees.

Is it possible for a triangle to have only one obtuse exterior angle?
(Image Source: Pixabay.com)

Is it possible for a triangle to have only one obtuse exterior angle?

A triangle is defined as a polygon with three sides and three vertices, and it is a fundamental property of triangles that they can have a maximum of one obtuse angle.


📹 Triangle Angle Properties

Measure I’m going to make that exterior angle acute so you can see it doesn’t matter what kind of triangle I have these two interior …


Two Vertices Of A Triangle Have An Obtuse Exterior Angle.
(Image Source: Pixabay.com)

Rafaela Priori Gutler

Hi, I’m Rafaela Priori Gutler, a passionate interior designer and DIY enthusiast. I love transforming spaces into beautiful, functional havens through creative decor and practical advice. Whether it’s a small DIY project or a full home makeover, I’m here to share my tips, tricks, and inspiration to help you design the space of your dreams. Let’s make your home as unique as you are!

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  • … Good day to you, Regarding the ” Exterior Angle Theorem ” it would be beneficial for beginning students to give a bit more explanation for a thorough understanding, because my experience with for instance tutoring students they will not remember the theorem without a clear understanding, so what I would do is to also first show the relationship between the exterior angle X and the interior angles ( T deg., 88 deg., 39 deg. ) of the triangle as follows … ( assume unknown angle T ) …. 180 deg. – X deg. = T deg. = 180 deg. – (88 deg. + 39 deg.) … – X deg. = – (88 deg. + 39 deg.) … X deg. = 88 deg. + 39 deg. = 127 deg. … now students can see for themselves that this theorem didn’t randomly fall out of the sky! I personally don’t like to learn theorems, but rather understand them! Thanks for your math efforts … best regards, Jan-W

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