To find the hypotenuse of a right triangle, use the formula for the pythagorean theorem. This is a^2+b^2=c^2, with the two side lengths as a and b and the hypotenuse being c. So, 28^2+21^2=1225
1225 is your hypotenuse length!
Please make me brainliest <3
Answer:
Its A
Step-by-step explanation:
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