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m<2=80° m<3=100° m<4=80°

B. A. 1. 2. 10. 9. 12. 11. 4. 3. C. D. 5. 6. 13. 14. 15. 16. 7. 8. s. t. Example: If line AB is parallel to line CD and s is parallel to t, find the measure of all the angles when m< 1 = 100 ° . Justify your answers. m<2=80° m<3=100° m<4=80°.

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m<2=80° m<3=100° m<4=80°

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  1. B A 1 2 10 9 12 11 4 3 C D 5 6 13 14 15 16 7 8 s t Example: If line AB is parallel to line CD and s is parallel to t, find the measure of all the angles when m< 1 = 100°. Justify your answers. m<2=80° m<3=100° m<4=80° m<5=100° m<6=80° m<7=100° m<8=80° m<9=100° m<10=80° m<11=100° m<12=80° m<13=100° m<14=80° m<15=100° m<16=80°

  2. B A 1 2 10 9 12 11 4 3 C D 5 6 13 14 15 16 7 8 s t Example: If line AB is parallel to line CD and s is parallel to t, find: 1. the value of x, if m<3 = 4x + 6 and the m<11 = 126. 2. the value of x, if m<1 = 100 and m<8 = 2x + 10. 3. the value of y, if m<11 = 3y – 5 and m<16 = 2y + 20. ANSWERS: 1. 30 2. 35 3. 33

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