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SUPPLEMENTARY ANGLES. 2-angles that add up to 180 degrees. COMPLEMENTARY ANGLES. 2-angles that add up to 90 degrees. Vertical Angles . Vertical Angles are Congruent to each other. <1 =<3 <2=<4 <1+<2=180 degrees <2+<3=180 degrees <3+<4=180 degrees <4+<1=180 degrees.

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## SUPPLEMENTARY ANGLES

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**Vertical Angles are Congruent to each other**• <1 =<3 • <2=<4 • <1+<2=180 degrees • <2+<3=180 degrees • <3+<4=180 degrees • <4+<1=180 degrees**The sum of 2-sides of a triangles must be larger than the**3rd side.**(Upside down T!!!!)**(Big Angle Small Angle!!!!!)**CENTROID**MEDIANS ARE IN A RATIO OF 2:1**Parallelogram**• Opposite sides are congruent. • Opposite sides are parallel. • Opposite angles are congruent. • Diagonals bisect each other. • Consecutive (adjacent) angles are supplementary (+ 180 degrees). • Sum of the interior angles is 360 degrees.**Rectangle**• All properties of a parallelogram. • All angles are 90 degrees. • Diagonals are congruent.**Rhombus**• All properties of a parallelogram. • Diagonals are perpendicular (form right angles). • Diagonals bisect the angles.**Square**• All properties of a parallelogram. • All properties of a rectangle. • All properties of a rhombus.**Isosceles Trapezoid**• Diagonals are congruent. • Opposite angles are supplementary + 180 degrees. • Legs are congruent

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