A 30-60-90 triangle has interior angles equal to 30, 60 and 90 degrees. This is always a right triangle with the 90-degree angle located opposite the longest side of the triangle and the 30 degree angle located opposite the smallest side. The sides of a 30-60-90 triangle are always in a 1:root 3:2 ratio with each other, where 2 represents the longest side of the triangle.
https://www.reference.com/math/many-degrees-equilateral-triangle-1ee90661bf420805
All triangles have a total of 180 degrees. The internal angles of any triangle add up to 180 degrees. Therefore, a RIGHT triangle's angle's added together equal 180 degrees. …The Right Angle = 90 degrees + the other 2 angles total 90 degrees, making the total number of degrees in a Right Angle Triangle = 180 degrees.
http://www.answers.com/Q/How_many_degrees_does_a_triangle_add_up_to
The three interior angles of a triangle always add up to 180 degrees, which is one of the identifying characteristics of a triangle. Each shape has properties that are unique to that specific figure.
https://www.reference.com/math/many-degrees-equilateral-triangle-1ee90661bf420805
there are exactly 180 degrees in a triangle, no matter if it is an obtuse, acute or right triangle. The some of all the angles in a triangle will always be 180 degrees. Of course, there are exceptions to this. The angles of a triangle are 180 degrees only when drawn on a plane. If you were to draw a triangle on a curve surface, then the angles wouldn't add up to 180 degrees. Take for example, Earth.
https://www.quora.com/How-many-degrees-are-in-a-triangle
If the sum is not 180° you are not in Euclidean space. If the three angles of a triangle add up to more than 180° then you are in a spherical space, if the sum is less tha…n 180° it is a hyperbolic space.The internal angles of a planar (Euclidean) triangle always add up to 180 degrees.
http://www.answers.com/Q/How_many_degrees_does_a_triangle_add_up_to
Degrees: Circles, Triangles, Rectangles, Squares. Circles. You already know that a circle has 360° . Circles can be divided into different sectors: a half circle or semi-circle has 180° , a quarter circle has 90° , and an eighth of a circle has 45° . Circles are covered in more detail elsewhere in the book.
http://mathforum.org/sarah/hamilton/circles.triangles.html
We know that all the angles add up to 180 degrees but cant find a valid reason for it. Suppose that you had a right angle triangle. Note that if you take it and another copy of it (moved around a bit) the two triangles together can be placed to make a rectangle.
http://mathcentral.uregina.ca/QQ/database/QQ.09.06/becky1.html
This rectangle has four 90 degree angles adding up to 360 degrees. Since the triangles are congruent each triangle has half as many degrees, namely 180. So this is true for any right triangle. Suppose you triangle is not a right triangle. Draw a perpendicular from the vertex opposite the longest side, to the longest side. What you have now is two right triangles which, by the above contain 360 degrees in total. But if you look at the two right angles that add up to 180 degrees so the other angles, the angles of the original triangle, add up to 360 - 180 = 180 degrees.
http://mathcentral.uregina.ca/QQ/database/QQ.09.06/becky1.html
A triangle is a closed figure that has three sides and three angles. The sum of the three angles of every triangle always equals 180° . A right triangle always has one angle equal to 90° and two angles whose sum is 90° , making a total of 180° . A rectangle is a four sided shape. with four right angles (90° ).
http://mathforum.org/sarah/hamilton/circles.triangles.html
How many degrees are in a polygon? The degrees of a polygon, or the sum of its angles, depends on the number of sides the polygon has. The sum of the degrees of the angles of a polygon equals 180(n-2), where n equals the number of sides of the polygon.
https://www.reference.com/math/many-degrees-equilateral-triangle-1ee90661bf420805
how many degrees are in a triangle
There are 180 degrees in a triangle. There are 180 degree in a triangle.