# What angles does an equilateral triangle have?

## What angles does an equilateral triangle have?

Sal proves that the angles of an equilateral triangle are all congruent (and therefore they all measure 60°), and conversely, that triangles with all congruent angles are equilateral.

What 3 angles form a triangle?

So, the three interior angles of a triangle are 40°, 75°, and 65°.

### What is the rule for equilateral triangles?

All three sides are equal. All three angles are congruent and are equal to 60 degrees. It is a regular polygon with three sides. The perpendicular drawn from vertex of the equilateral triangle to the opposite side bisects it into equal halves.

Internal angle (degrees) 60° In geometry, an equilateral triangle is a triangle in which all three sides have the same length. In the familiar Euclidean geometry, an equilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°.

## How can you prove that a triangle is equilateral?

The Equilateral Triangle has 3 equal sides. The Equilateral Triangle has 3 equal angles. The total sum of the interior angles of a triangle is 180 degrees, therefore, every angle of an equilateral triangle is 60 degrees. It is a 3 sided regular polygon.

What is a real life example of an equilateral triangle?

These traffic rules are specified in the form of traffic signs. These traffic signs are also the best real-life examples of the equilateral triangles. Its reason is that all the sides of these traffic signs are equal in length. The Bermuda triangle is also the best example of the triangular shape.

### Does equilateral triangle have equal sides and equal angles?

Identifying equilateral triangles. An equilateral triangle has three equal sides and three equal angles (which are each 60°). Its equal angles make it equiangular as well as equilateral.

What angles are equal in similar triangles?

If two triangles have two of their angles equal, the triangles are similar. If two of their angles are equal, then the third angle must also be equal, because angles of a triangle always add to make 180°. So AA could also be called AAA (because when two angles are equal, all three angles must be equal).