1.

2. 3. 4. 5. 6. 5 7. 8. 65 A B C AC 5 AB BC 6 2= 3 ABC AB 2+ 3 2=5 2 AB 2 =25-9 AB 2 =16 AB=44 9. A B C 1012 AC 12 AB BC 10 2= 5 ABC AB 2=12 2+ 5 2 AB 2 =144 + 25 AB 2 =169 AB=1313 10. A B C 1013 AC AB BC 10 2= 5 ABC AC 2+5 2 =13 2 AC 2 =169 25AC 2 =144 AC=1212 11. = x x = x 3 1 1 3 12. 1) 22 15 = x x = x (x )x = x (22x22)x15 = 22x 22 x 5 =2,420 1 3 1 3 1 3 13. 214 25 A B C AC AB BC 14 2= 7 ABC AC 2+7 2 =25 2 AC 2 =625 - 49 AC 2 =576 AC=2424 14. = x x = x (x )x = x (14x14)x24 = 14x 14 x 8 =1,568 1 3 1 3 1 3 15. = =x(x x ) =x x 16. = x x =x = + 17. 36 5 ABC AB 2+ 3 2=5 2 AB 2 =25 9AB 2 =16 AB=44 A B C AC 5 AB 18. = x x = x ( 6 + 6 + 6 + 6 )x4 = x24x 4 = 48 =x = + =6x6=36 = += 36 + 48 =84 19. A B C 41012 AC 12 AB BC 10 2= 5 ABC AB 2=12 2+ 5 2=144 + 25=169 AB=1313 = x x = x (10 + 10 + 10 + 10)x13 = x40x 13 = 260