Question

2. Three sides of a quadrilateral are 30 cm, 40 cm and 25 cm. Find the length of its
fourth side if the perimeter is 130cm.​

Answer 1

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Answer 2

Answer:

The length of the fourth side is 35cm.

Step-by-step explanation:

Let ABCD be the quadrilateral.

Let AB =30 cm, BC = 40cm ; CD = 25 cm ; AD =?

Now, AB+BC+CD+AD=130cm

30+40+25+AD= 130 cm

95+AD = 130cm

AD = 130-95

AD = 35cm

The length of the fourth side is 35 cm.