The common vertex between two points
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An included angle is the angle made by two lines with a common vertex.
Which segment is included by A and C?
The 'included side' is the side between the two given angles. The 'included angle' is the angle between the two given sides.
Multiply ( pi R2 ) by [ (angle included in the sector) / 360 ].
Side-Angle-Side is a rule used in geometry to prove triangles congruent. The rule states that if two sides and the included angle are congruent to two sides and the included angle of a second triangle, the two triangles are congruent. An included angle is an angle created by two sides of a triangle.