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# What are types of triangles?

Several types of triangles exist, including scalene, isosceles, equilateral, right, obtuse and acute. Triangles are categorized according to their sides, angles or a combination of both.

Continue ReadingScalene, isosceles and equilateral triangles are categorized by their sides. Scalene triangles are triangles with no sides that are equal in length. Isosceles triangles have at least two equal sides. Equilateral triangles have three equal sides. Each of the three angles in an equilateral triangle measures 60 degrees.

Right, obtuse and acute triangles are classified according to their angles. Right triangles have a 90-degree angle. Obtuse triangles have one angle that is greater than 90 degrees. Acute triangles have all angles less than 90 degrees, and their angles are referred to as acute angles.

Triangles also can be classified by both their sides and angles. A right isosceles triangle has one right angle and two sides that are equal. An acute scalene triangle is a triangle with all acute angles and no equal sides. An obtuse isosceles triangle is a triangle with two equal sides and one obtuse angle. The sum of all the angles in any kind of triangle is 180 degrees. The third side of any kind of triangle must always be shorter than the sum of the other two sides.

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## How do you solve for the perimeter of an isosceles triangle?

A: The perimeter of a triangle is the sum of all the sides of the triangle, and you determine the perimeter of any triangle by adding the lengths of all three... Full Answer >Filed Under: -
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## How do you find the hypotenuse of an isosceles triangle, given two lengths?

A: Use the Pythagorean theorem to calculate the hypotenuse of a right triangle. A right triangle is a type of isosceles triangle. The hypotenuse is the side o... Full Answer >Filed Under: -
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## Where can you find puzzles where you count how many triangles are in an image?

A: The easiest way to find puzzles where counting the number of triangles is the goal is to search online for them. Because math, children's books and plain t... Full Answer >Filed Under: -
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## What is the SSS congruence postulate?

A: The SSS congruence postulate states that if all three sides of one triangle are congruent to the corresponding sides of another triangle, the triangles the... Full Answer >Filed Under: