Find The Measure Of An Interior Angle Of A Triangle. The three interior angles in a triangle will always add up to 180. The regular triangle has 3 interior angles of 60 and 3 exterior angles of 120.
This videos provides an example of how to use an exterior angle of a triangle to determine the measure of a missing interior angle of a triangleSite. Since the interior angles add up to 180 every angle must be less than 180. Properties of Interior Angles The sum of the three interior angles in a triangle is always 180.
Answer - The sum of the interior angles of a triangle is 180 degrees.
The exterior angle have a sum of 360 3120 The square has 4 interior angles of 90o and 4 exterior angles of 90. The sum of an interior angle and its adjacent exterior angle is 180. In trigonometry the law of cosines also known as the cosine formula or cosine rule relates the lengths of the sides of a triangle to the cosine of one of its angles. 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.