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Angle Relationships & Parallel Lines

Angle Relationships & Parallel Lines. Pre-Algebra. 1) Find the missing angle. 90° – 36 = 54 °. ? °. 36 °. 2) Find the missing angle. 90° – 64° = 26 °. ? °. 64 °. 3) Solve for x. 3x° + 2x° = 90 ° 5x = 90 x = 18 °. 2x °. 3x °. 4) Solve for x.

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Angle Relationships & Parallel Lines

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  1. Angle Relationships&Parallel Lines Pre-Algebra

  2. 1) Find the missing angle. 90° – 36 = 54° ?° 36°

  3. 2) Find the missing angle. 90° – 64° = 26° ?° 64°

  4. 3) Solve for x. 3x° + 2x° = 90° 5x = 90 x =18° 2x° 3x°

  5. 4) Solve for x. (2xº+ 5º) + (xº+ 25º) = 90º 3xº+ 30º= 90º 3xº= 60º x = 20º xº+ 25º 2xº+ 5º

  6. 5) Find the missing angle. 180° – 168° = 12° 168° ?°

  7. 6) Find the missing angle. 180° – 58° = 122° ?° 58°

  8. 7) Solve for x. 4xº+ 5xº= 180º 9xº= 180º x = 20º 4xº 5xº

  9. 8) Solve for x. (2xº+ 10º) + (3xº+ 20º) = 180º 5xº+ 30º= 180º 5xº= 150º x = 30º 2xº+ 10º 3xº+ 20º

  10. 9) Lines l and m are parallel.l||mFind the missing angles. 42° a ° c° b° l d° e° g° f° m

  11. 9) Lines l and m are parallel.l||mFind the missing angles. 42° 138° 138° 42° l 42° 138° 138° 42° m

  12. 10) Lines l and m are parallel.l||mFind the missing angles. 81° a ° c° b° l d° e° g° f° m

  13. 10) Lines l and m are parallel.l||mFind the missing angles. 81° 99° 99° 81° l 81° 99° 99° 81° m

  14. 11) Find the missing angles. Hint: The 3 angles in a triangle sum to 180°. 70 ° 70 ° 70º + 70º + bº = 180º 140º + bº = 180º b = 40º b° bº + dº + 65º = 180º 40º + dº + 65º = 180º 105º + dº = 180º d= 75º d ° 65 °

  15. 12) Find the missing angles. Hint: The 3 angles in a triangle sum to 180°. 45 ° 50 ° 45º + 50º + bº = 180º 95º + bº = 180º b = 85º b° bº + dº + 75º = 180º 85º + dº + 75º = 180º 160º + dº = 180º d= 20º d ° 75 °

  16. In the figure a || b. 13. Name the angles congruent to 3. 1, 5, 7 14. Name all the angles supplementary to 6. 1, 3, 5, 7 15. If m1 = 105° what is m3? 105° 16. If m5 = 120° what is m2? 60°

  17. Homework • STUDY FOR TEST tomorrow!!!

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