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Exterior angle thereom day 2.notebook December 15, 2015 Warm up 1) Solve for x 2) Find each missing angle 3) Classify the triangle! x 42 o x Exterior angle thereom day 2.notebook December 15, 2015 Exterior Angle Theorem An interior angle angle formed by two sides An exterior angle angle formed by one side and the extension of an adjacent side. Remote interior angle: interior angle not adjacent to the exterior angle. Exterior Angle Theorem In a triangle, the measure of the exterior angle is equal to the sum of the measure of the two remote interior angles. RI RI + RI = EXT RI EXT Exterior angle thereom day 2.notebook December 15, 2015 Solve for the missing angle using an equation. R RI RI + RI = EXT 45 RI EXT x 55 S T Solve for the missing angle using an equation. RI + RI = EXT x EXT 60 RI 25 RI Exterior angle thereom day 2.notebook December 15, 2015 Use the Exterior Angle Theorem to find the measure of the each angle in the diagram R RI + RI = EXT RI 4x Isosceles RI 7x T EXT 7x 110 S Solve for the missing angle using an equation. R P RI + RI = EXT 30 RI 8 + 6x EXT 4x + 2 RI Q H Exterior angle thereom day 2.notebook 5) 6) December 15, 2015 Exterior angle thereom day 2.notebook 7) December 15, 2015
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