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Solution to the problem of loose-leaf Pythagorean theorem in mathematics
First picture

27. connection AC s =1/2 * (15 * 36-12 * 9) = 216.

28.a^2+b^2=c^2

The second, third and fourth photos

12. right angle b

13. 108

14.2: 1

17. 12/5

18. Right angle

19.2

20. 17

2 1.5^2+ 12^2= 13^2

22.36 connecting BD

(All are done by hand on site, please adopt)

23.a=24 b= 18 c=30 right triangle

24. 120