The Interior Angles of a Triangle always add up to 180°, and they are formed where two sides of the triangle meet. To find the measures of these angles, use the POLYGON tool to construct a triangle ABC, select the ANGLE tool, click anywhere inside the polygon, and go to the Algebra view. Calculate the sum of the measures of the interior angles in a triangle.
In this lesson, we will discuss how to find the measures of the interior angles of polygons, name polygons based on the number of sides, and discuss the number of triangles that make up the polygon. The interior angles of a triangle are the three angles on the inside of a triangle, which always add up to 180°. The exterior angles of a triangle are equal to the sum of the two interior angles that are not.
The sum of the three interior angles in a triangle is always 180°, so every angle must be less than 180°. The formula for the sum of the measure of the interior angles of a regular polygon is M = (n-2)•180, where n is the number of sides.
In summary, the sum of the measures of the interior angles in any triangle is always 180°, and using the formula for the sum of the interior angles of a regular polygon can help solve for missing angles and set up equations using the interior angles.
📹 Finding the Missing Angle of a Triangle: A Step-by-Step Guide | Triangles | Math with Mr. J
Welcome to “Finding the Missing Angle of a Triangle: A Step-by-Step Guide” with Mr. J! Need help with finding the missing angle …
📹 Ex: Find the Measure of an Interior Angle of a Triangle
This videos provides an example of how to determine the measure of a missing interior angle of a triangle.
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