Respuesta :

ferrybukantoro

Step-by-step explanation:

the length of hypotenuse =

√(21²+28²) = √(441+784)

= √1225

= 35 yd

the perimeter of triangle =

21+28+35 = 84 yd

the area of triangle =

½×21×28 = 294 yd²

shadiptoshouhardo002

Answer: 35 yd

Step-by-step explanation:

28^2+21^2=1225

√1225

=35