Question

find the perimeter if its length is 12 cm and one of its diagonal is 13 cm​

Answer 1

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Answer 2

Answer:

if it is a rectangle than it will form two right angled triangle

given = 13 cm is common for both  hpy² = base²+height²

                                                           `13² =12² +x²

                                                             x²=   `13² -  12²

                                                              =199 - 144 =55

                                                               x²=55

                                                                 x = √ 55