# Quick Answer: What Does An Obtuse Triangle Look Like?

## What are the 7 types of triangles?

To learn about and construct the seven types of triangles that exist in the world: equilateral, right isosceles, obtuse isosceles, acute isosceles, right scalene, obtuse scalene, and acute scalene..

## How can you tell if a triangle is acute or obtuse?

An acute triangle has three angles that each measure less than 90 degrees. An obtuse triangle is a triangle with one angle that is greater than 90 degrees.

## What are the sides of an acute triangle?

Any triangle in which the Euler line is parallel to one side is an acute triangle. Acute triangles can be isosceles, equilateral, or scalene. The longest side of an acute triangle is opposite the largest angle.

## Which Triangle is a 30 60 90 Triangle?

right triangleA 30-60-90 triangle is a special right triangle (a right triangle being any triangle that contains a 90 degree angle) that always has degree angles of 30 degrees, 60 degrees, and 90 degrees. Because it is a special triangle, it also has side length values which are always in a consistent relationship with one another.

## What are 3 ways to classify a triangle by its sides?

Classifying Triangles by Sidesscalene triangle-a triangle with no congruent sides.isosceles triangle-a triangle with at least 2 congruent sides (i.e. 2 or 3 congruent sides)equilateral triangle-a triangle with exactly 3 congruent sides.NOTE: Congruent sides means that the sides have the same length or measure.

## How do you classify a right triangle?

A right triangle has to have one angle equal to 90 degrees. All isosceles triangles are equilateral. The only requirement for an isosceles triangle is for at minimum 2 sides to be the same length. An isosceles triangle can have more than 2 sides of the same length, but not less.

## What does a acute triangle look like?

An acute triangle has three inscribed squares, each with one side coinciding with part of a side of the triangle and with the square’s other two vertices on the remaining two sides of the triangle. (In a right triangle two of these are merged into the same square, so there are only two distinct inscribed squares.)

## What are the sides of an obtuse triangle?

Obtuse Angled Triangle Properties The side opposite to the obtuse angle is the longest side of the triangle. An obtuse triangle will have one and only one obtuse angle. The other two angles are acute angles.

## Which sentence is true about an obtuse triangle?

While any angle exceeds 90 degrees, it is an obtuse triangle. In any triangle, two of the interior angles are always acute (less than 90 degrees)*, so there are three possibilities for the third angle: Less than 90° – all three angles are acute and so the triangle is acute. Exactly 90° – it is a right triangle.

## How many vertices does a obtuse triangle have?

9 verticesThe triangle ABC is obtuse if and only if A, B, and C all lie on some arc which is less than a semicircle (i.e., encompasses fewer than 9 vertices of the polygon). This is the same as saying that two of the three numbers add up to less than 9, which is equivalent to the third number being greater than 9.

## How do you classify a triangle?

Classifying Triangles by Angles Triangles can also be classified by their angles. In an acute triangle all three angles are acute (less than 90 degrees). A right triangle contains one right angle and two acute angles. And an obtuse triangle contains one obtuse angle (greater than 90 degrees) and two acute angles.

## How do you classify a triangle by its side lengths?

Classifying Triangles You can determine whether a triangle is acute, right, or obtuse by its side lengths. In TABC with longest side c: If c2 a2 b2, then TABC is acute. If c2 a2 b2, then TABC is right.

## Can you have a right obtuse triangle?

Note: It is possible for a right triangle to also be scalene or isosceles. An obtuse triangle has one angle measuring more than 90º but less than 180º (an obtuse angle). … It may be acute, obtuse, equiangular, scalene, isosceles, or equilateral, but not a right triangle.

## What is a 45 degree triangle?

A 45 – 45 – 90 degree triangle (or isosceles right triangle) is a triangle with angles of 45°, 45°, and 90° and sides in the ratio of. Note that it’s the shape of half a square, cut along the square’s diagonal, and that it’s also an isosceles triangle (both legs have the same length).

## What are the six types of triangles?

Six Types of TrianglesBased on their SidesBased on their AnglesScalene TriangleAcute TriangleIsosceles TriangleObtuse TriangleEquilateral TriangleRight TriangleAug 20, 2020

## How do you know if a triangle is obtuse?

An acute triangle has three angles that each measure less than 90 degrees. An obtuse triangle is a triangle with one angle that is greater than 90 degrees.

## What does a right obtuse triangle look like?

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.

## What does it mean when a triangle is obtuse?

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.

## Does 5 12 and 13 form a right triangle?

Answer and Explanation: Yes, a right triangle can have side lengths 5, 12, and 13.