Question

please answer this question for 19 points..??

Answer 1

in ∆ABC,
AB^2+BC^2=AC^2
28^2+21^2=AC^2
AC^2=1225
AC=35
Area of triangle=1/2×28×21
=14×21=294cm^2


Sorry, I don't know how I explain this answer.

Answer 2

Step-by-step explanation:

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