an equilateral triangle has three angles that are how many degrees
PROPERTIES OF EQUILATERAL TRIANGLE. 1. All three sides and three angles are equal. 2. The three angles are 60 degrees each. 3. The angle bisectors, the medians and the perpendicular bisectors of the three sides coincide. It is also the centroid. 4. The incenter and the circumcenter coincide and are within the triangle. 5. There are three special names given to triangles that tell how many sides (or angles) are equal. There can be 3, 2 or no equal sides/angles: Equilateral Triangle. Proofs concerning equilateral triangles. AboutTranscript. 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. Created by Sal Khan. What we've got over here is a triangle where all three sides have the same length, or all three sides are congruent to each other. And a triangle like this we call equilateral. This is an equilateral triangle. Now what I want to do is prove that if all three sides are the same, then we know that all three angles are going to have the same measure. 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. 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. The angle bisectors of the three angles of XYZ, intersect at the incenter of the circle. With that incenter a circle can be drawn to touch the three sides internally. 6. Triangles Can be Solved Using: 1  Pythagoras's Theorem. 2  Sine Rule. 3  Cosine Rule. 4  Angles all add up to 180 degrees. Proofs concerning equilateral triangles About Transcript 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.  3.equilateral triangle ( all three sides of equal length ) b.according to their angle. 1.acute angled triangle ( all the three angles are acute i.e less than 90degree ) 2.right angled triangle ( any one of the three angle is equal to 90 degree ) 3.obtuse angle triangle ( any on of the three angles is greater than 90 degree but less than 180 degree ) so there are total six types of triangle. 297 Views · 1 Upvote A right-angled triangle has one angle measuring 90 degrees. The side opposite this angle is known as the hypotenuse and it is the longest side. Sine and cosine are trigonometric functions of an angle and are the ratios of the lengths of the other two sides to the hypotenuse of a right-angled triangle.
An equilateral triangle has three angles, the three angles are 60 degrees each.