3 years ago

29 mm 가 120 mm D What is the perimeter? millimeters

1 answer:

7 0

Pythagoras theorem : a^2 + b^2 = c^2

20^2 + b^2 = 29^2

400 + b^2 = 841

841 - 400 = 441

Square root 441 = 21

PERIMETER :

21+29+20 = 70

The answer is 70

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