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tamaranim1 [39]
3 years ago
13

PLEASE HELP I GIVE THANKS

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
8 0
Well for 3.  you use the Pythagorean theorem to say that 28^2 - 18^2= x^2 so 21.4  and for 4. the Pythagorean theorem says a^2 + b^2 = c^2 with c being the hypotenuse of any right triangle so the sums of the two smaller squares make the sum of the larger square making the answer b 
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