# What are the 4 types of triangles?

• Equilateral triangle. The Equilateral triangle shown on the left has three equal sides and three equal angles.
• Isosceles triangle. The Isosceles triangle shown on the left has two equal sides and two equal angles.
• Scalene Triangle. The Scalene Triangle has no congruent sides.
• Acute Triangle.
• Obtuse Triangle.
• Also, which triangle is scalene?

Scalene Triangle. A scalene triangle is a triangle that has three unequal sides, such as those illustrated above. SEE ALSO: Acute Triangle, Equilateral Triangle, Isosceles Triangle, Obtuse Triangle, Triangle.

What is the definition of acute scalene triangle?

An ACUTE triangle contains three acute angles. (In other words, each angle of an acute triangle is less than 90 degrees.) A SCALENE triangle is one in which all sides have different lengths (and therefore, all angles have different measures).

Can you draw an obtuse angled isosceles triangle?

(A “regular” polygon has all equal sides and all equal angles.) An obtuse triangle has one angle measuring more than 90º but less than 180º (an obtuse angle). It is not possible to draw a triangle with more than one obtuse angle. Note: It is possible for an obtuse triangle to also be scalene or isosceles.

## How many kinds of angles are there?

In geometry, there are three types of angles: acute angle-an angle between 0 and 90 degrees. right angle-an 90 degree angle. obtuse angle-an angle between 90 and 180 degrees.

## Do all triangles have to equal 180?

As we know, if we add up the interior and exterior angles of one corner of a triangle, we always get 1800. And our little drawing shows that the exterior angle in question is equal to the sum of the other two angles in the triangle.

## What is triangle and its type?

Triangles can be classified according to the lengths of their sides: An equilateral triangle has all sides the same length. An equilateral triangle is also a regular polygon with all angles measuring 60°. An isosceles triangle has two sides of equal length. A scalene triangle has all its sides of different lengths.

## What is a triangle with a 60 degree angle called?

Equilateral triangle: All angles are the same (60 degrees) Isosceles triangle: Has two angles the same and two sides the same. Scalene triangle: Has all three angles and all three sides different. Obtuse triangle: Has one obtuse angle, greater than 90 degrees. The sum of all angles in a triangle is ___________ degrees.

## How many types of triangles are there and what are they?

If a triangle doesn’t have two or three equal angles, it could have zero equal angles. These triangles, which also don’t have any equal sides, are known as scalene triangles. Can you believe that there are three different types of triangles?

## What is an isosceles right triangle?

A right triangle with the two legs (and their corresponding angles) equal. An isosceles right triangle therefore has angles of , , and . For an isosceles right triangle with side lengths , the hypotenuse has length , and the area is . The hypotenuse length for is called Pythagoras’s constant.

## What does isosceles?

In geometry, an isosceles triangle is a triangle that has two sides of equal length. Sometimes it is specified as having two and only two sides of equal length, and sometimes as having at least two sides of equal length, the latter version thus including the equilateral triangle as a special case.

## Can you have a triangle with two right angles?

That would contradict with the fact that, sum of all angles of a triangle is 180. No, you can not have a triangle with 2 right angles. The sum of the internal angles of a triangle is 180 degrees. Two right angles together make 180 degrees Your third angle will be 0 degrees which is absurd.

## What is a obtuse scalene triangle?

A scalene triangle is a triangle that has three unequal sides, such as those illustrated above. SEE ALSO: Acute Triangle, Equilateral Triangle, Isosceles Triangle, Obtuse Triangle, Triangle. CITE THIS AS: Weisstein, Eric W. “

## What are the sides of a right triangle called?

The relation between the sides and angles of a right triangle is the basis for trigonometry. The side opposite the right angle is called the hypotenuse (side c in the figure). The sides adjacent to the right angle are called legs (or catheti, singular: cathetus).

## Why can’t a triangle have more than one obtuse angle?

Triangle cannot have more than one obtuse angle because there are 3 side and if you add three sides it equals to 180 degree and obtuse angle is greater than 90 degree and the other two has to be less than 90 degree.

## What is the obtuse angle?

The obtuse angle is the smaller angle. It is more than 90° and less than 180°. The smaller angle is an Obtuse Angle, but the larger angle is a Reflex Angle.

## What is an obtuse scalene triangle?

In an obtuse triangle, one angle is greater than a right angle—it is more than 90 degrees. An obtuse triangle may be isosceles or scalene. In an acute triangle, all angles are less than right angles—each one is less than 90 degrees. An acute triangle may be equilateral, isosceles, or scalene. Common Formulas.

## What is a scalene triangle look like?

Because an equilateral triangle is also isosceles, all triangles are either scalene or isosceles. But when people call a triangle isosceles, they’re usually referring to a triangle with only two equal sides, because if the triangle had three equal sides, they’d call it equilateral.

five angles

## What is the meaning of obtuse triangle?

An obtuse triangle is a triangle in which one of the angles is an obtuse angle. (Obviously, only a single angle in a triangle can be obtuse or it wouldn’t be a triangle.) A triangle must be either obtuse, acute, or right.

## What is the name of a triangle with two equal sides?

A triangle with all sides equal is called an equilateral triangle, and a triangle with no sides equal is called a scalene triangle. An equilateral triangle is therefore a special case of an isosceles triangle having not just two, but all three sides and angles equal.

## What are the different triangles?

A triangle is scalene if all of its three sides are different (in which case, the three angles are also different). If two of its sides are equal, a triangle is called isosceles. A triangle with all three equal sides is called equilateral.

## Is every equilateral triangle acute?

So – back to triangles: An Equilateral Triangle is still Isosceles. It does have two equal sides (and more). It also has two equal angles (and more)! Acute is a somewhat different property but clearly all angles of an equilateral triangle are less than 90 degrees.

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