The lengths of two sides of an isosceles triangle are 9 cm and 20 cm. What is the perimeter of the triangle? Give reason.
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Answer:
20 +20+9=49
Step-by-step explanation:
as in isoceles triangle the two sides are equal. your doubt will be there why we can't take 9 as the same side .it is because 9+9=18 which will not be greater than 20. it will not satisfy the triangle property. sum of two sides are always equal
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