Question

find the unknown length x in this figure​

Answer 1

Perimeter of the rhombus =4a

Where a = one side length

Thus perimeter of a rhombus =4×3=12 cm.

Answer 2

Answer:

side1²+side²=hypotenuse ²

x²+3²=12²

x²=12²-3²

x²=144-9

x²=135

x=3√15

x=11.61cm

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