Triangles are one of the most fundamental geometric shapes and have a variety of often studied properties including: Show Rule 1: Interior Angles sum up to $$ 180^0 $$  Rule 2: Sides of Triangle -- Triangle Inequality Theorem : This theorem states that the sum of the lengths of any 2 sides of a triangle must be greater than the third side. ) Rule 3: Relationship between measurement of the sides and angles in a triangle: The largest interior angle and side are opposite each other. The same rule applies to the smallest sized angle and side, and the middle sized angle and side. Rule 4 Remote Extior Angles-- This Theorem states that the measure of a an exterior angle $$ \angle A$$ equals the sum of the remote interior angles' measurements. more) How do you find the degree of a triangle with 3 sides?"SSS" is when we know three sides of the triangle, and want to find the missing angles.. use The Law of Cosines first to calculate one of the angles.. then use The Law of Cosines again to find another angle.. and finally use angles of a triangle add to 180° to find the last angle.. What is the angle of a 3 sided triangle?A triangle has three sides, three angles, and three vertices. The sum of all internal angles of a triangle is always equal to 180°. This is called the angle sum property of a triangle. The sum of the length of any two sides of a triangle is greater than the length of the third side.
Do the three sides of a triangle add up to 180?The three interior angles of a triangle will always have a sum of 180°. A triangle cannot have an individual angle measure of 180°, because then the other two angles would not exist (180°+0°+0°).
How many degrees are there in 3 triangles?A piece of trivia that is true for all triangles: The sum of the three angles of any triangle is equal to 180 degrees.
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How many degrees is a 3 sided triangle?
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