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Line segment . Distance between two points.

Point. A location. Line . Opposite directions infinitely. WHAT YOU SHOULD ALREADY KNOW. Line segment . Distance between two points. Ray . Goes in one direction infinitely. Angle. Two rays that share a common vertex. Vertex. The corner of an angle or shape.

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Line segment . Distance between two points.

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  1. Point. A location. Line. Opposite directions infinitely. WHAT YOU SHOULD ALREADY KNOW. Line segment. Distance between two points. Ray. Goes in one direction infinitely. Angle. Two rays that share a common vertex. Vertex. The corner of an angle or shape. Legs. Another way to say the sides or rays of an angle.

  2. COPY IN SPIRAL. 2 WAYS TO NAME AN ANGLE : Q R S R • BY • LEG, VERTEX, LEG • VERTEX LETTER MUST BE IN THE MIDDLE. 2. BY VERTEX ONLY. ONLY THE VERTEX LETTER. QRS SRQ R

  3. Things you need to know:COPY IN YOUR SPIRAL. • A circle has 360° • Straight angle: 180° • Obtuse angle: 91° to 179° • Right angle: exactly 90° • Acute angle: 1°-89° • Supplementary angles: 2 or more angles that add to 180° ADJACENT Supplementary angles: 2 or more angles that add to 180° and share a common vertex and side. • Complementary angles: 2 or more angles that add to 90° ADJACENTcomplementary angles: 2 or more angles that add to 90° and share a common vertex and side..

  4. EXAMPLES: Complementary Angles: Two or more angles whose sum is 22 + 36 + 32 = These angles are complementary

  5. ADJACENT Complementary Angles • Two or more angles that share a common vertexand side -whose sum is A B C E D BEC + AEB + DEC = 90° 30° 30° 30°

  6. EXAMPLESSupplementary Angles • Two or more angles whose sum is 90 + 33 + 57 = 180 These 3 angles are supplementary

  7. AFB + BFC + CFD + DFE = What is the measure of CFD? ADJACENT supplementary angles • Two or more angles that share a common vertex and side whose sum is A B C 47 61 F 23 D E

  8. COPY IN SPIRAL: Triangle angles are supplementary.ALWAYS. Because all 3 angles will ALWAYS add to 180°. NOW YOU MAY CLOSE YOUR SPIRAL AND WORK ON THE PRACTICE WORKSHEET..

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