Equilateral triangleAreaInternal angle (degrees)60°

Does a triangle have all 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.

Can a triangle have unequal sides?

(iii) Scalene triangle: if none of the three sides of a triangle are equal to each other, it is called a scalene triangle. Properties of the scalene triangle: All angles of a scalene triangle are unequal. … All sides of the given scalene triangle are unequal.

Does a triangle have to have 2 equal sides?

In general no, a triangle can have three, two, or no equal sides. The ones with three equal sides are known as equilateral. The ones with only two equal sides are known as isosceles. If a triangle is not equilateral or isosceles, its sides are unequal.

Does a right triangle have equal sides?

Yes, a right triangle can have two equal sides. The longest side is called the hypotenuse and the other two sides may or may not be equal to each other. A right triangle that has two equal sides is called an isosceles right triangle.

How many sides are there in a triangle?

Every triangle has three sides and three angles, some of which may be the same. The sides of a triangle are given special names in the case of a right triangle, with the side opposite the right angle being termed the hypotenuse and the other two sides being known as the legs. All triangles are convex and bicentric.

Which triangle has all sides equal?

An equilateral triangle has three equal sides and angles. It will always have angles of 60° in each corner.

How many triangle are there?

The drawing was shared on Quora earlier this month and has people scratching their heads. Most people on Quora unanimously agreed that the answer is 24, with each row containing six triangles.

What is a triangle equal to?

The sum of the three angles of any triangle is equal to 180 degrees.

What is a triangle with three different sides?

In addition to having three unequal sides, scalene triangles have three unequal angles. The shortest side is across from the smallest angle, the middle-length side is across from the mid-sized angle, and — surprise, surprise — the longest side is across from the largest angle.

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What are different triangles?

  • An isosceles triangle is a triangle with two congruent sides and one unique side and angle. …
  • An equilateral triangle is a triangle with three congruent sides and three congruent angles.

What are the 4 different types of triangles?

There are a number of different types of triangles, such as equilateral triangles, right triangles, scalene triangles, obtuse triangles, acute triangles, and isosceles triangles.

Is this triangle right-angled?

It is possible to determine if a triangle contains a right angle using Pythagoras’ theorem . If the squares of the two shorter sides add up to the square of the hypotenuse, the triangle contains a right angle.

How do you find a hypotenuse?

The hypotenuse is termed as the longest side of a right-angled triangle. To find the longest side we use the hypotenuse formula that can be easily driven from the Pythagoras theorem, (Hypotenuse)2 = (Base)2 + (Altitude)2. Hypotenuse formula = √((base)2 + (height)2) (or) c = √(a2 + b2).

Do triangles have right angles?

A triangle can have at most one right angle, or an angle that has a measure of 90°. When a triangle has a right angle, it is called a right…

Is this a triangle?

All you have to do is use the Triangle Inequality Theorem, which states that the sum of two side lengths of a triangle is always greater than the third side. If this is true for all three combinations of added side lengths, then you will have a triangle.

How do you identify a triangle?

When classifying a triangle by its sides, you should look to see if any of the sides are the same length. If no sides are the same length, then it is a scalene triangle. If two sides are the same length, then it is an isosceles triangle. If all three sides are the same length, then it is an equilateral triangle.

What are the 7 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.

Do triangle have 4 sides?

The triangle has three (3) sides. The triangle is a polygon that contains three sides and three inner angles and three vertices. Additional Information: … A triangle is a primitive form of geometry (polygon) that can only have three sides in its simplest form.

How many sides and corners do triangle have?

All triangles have three sides and three corners (angles). The point where two sides of a triangle meet is called a vertex.

How many sides does 12 triangle have?

3triangle, trigon12dodecagon, duodecagon13triskaidecagon, tridecagon14tetrakaidecagon, tetradecagon15pentadecagon

Why triangle is 180?

A triangle’s angles add up to 180 degrees because one exterior angle is equal to the sum of the other two angles in the triangle. In other words, the other two angles in the triangle (the ones that add up to form the exterior angle) must combine with the third angle to make a 180 angle.

What is the rule for triangle side lengths?

Triangle Inequality Theorem. The sum of the lengths of any two sides of a triangle is greater than the length of the third side.

How do you find the third side of a triangle?

Pythagorean Theorem for the Third Side of a Right Angle Triangle. The Pythagorean Theorem is used for finding the length of the hypotenuse of a right triangle. So, as long as you are given two lengths, you can use algebra and square roots to find the length of the missing side.

How do you find the third side of a triangle given two sides?

  1. Identify angle C. It is the angle whose measure you know.
  2. Identify a and b as the sides that are not across from angle C.
  3. Substitute the values into the Law of Cosines.
  4. Solve the equation for the missing side.

How do you find the sides of a triangle with one side?

  1. if leg a is the missing side, then transform the equation to the form when a is on one side, and take a square root: a = √(c² – b²)
  2. if leg b is unknown, then. b = √(c² – a²)
  3. for hypotenuse c missing, the formula is. c = √(a² + b²)

How many triangles are there in the following figure formula?

Hence, there are 32 triangles in the given figure.

What are the angles of a triangle?

The interior angles of a triangle always add up to 180° while the exterior angles of a triangle are equal to the sum of the two interior angles that are not adjacent to it.

What are the 12 types of triangles?

  • Scalene Triangle. A triangle that has no congruent sides.
  • Acute Triangle. A triangle that has all three angles with measures of less than 90 degrees.
  • Obtuse Triangle. A triangle that has one angle with a measure of greater than 90 degrees.
  • Isosceles Triangle. …
  • Equilateral Triangle. …
  • Right Triangle.