Protractor

15 kilograms

180°

Calculus

Sixty-four

Horizontal

Heptagon

3215

49

3.1415

Challenge the Brain

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Protractor

15 kilograms

180°

Calculus

Sixty-four

Horizontal

Heptagon

3215

49

3.1415

29

19 miles

0.8

2

5.75cm

0.68

180 degrees

Parallelogram

Obtuse

101, 103, 107