find area of a triangle two sides of which are 9cm and 12 cm and perimeter is 30 cm
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find area of a triangle two sides of which are 9cm and 12 cm and perimeter is 30 cm
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Answer:
Let the 3rd side be x
Perimeter = add all sides
9 + 12 + x = 30
21 + x = 30
x = 30 - 21
x = 9cm
Hence, Answer Verified
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