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Length of one of the equal sides of an isosceles triangle is 9 cm. If length of unequal side is 3 cm less than the sum of length of equal sides, find the perimetre of the triangle.
- a)30 cm
- b)33 cm
- c)36 cm
- d)39 cm
- e)None of these
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Length of one of the equal sides of an isosceles triangle is 9 cm. If ...
The correct answer is option 'B'.
Find the perimeter of the triangle by adding up the length of all three sides. In an isosceles triangle, two sides are equal, so we know that one side has a length of 9 cm. To find the length of the unequal side, we can use the information given that it is 3 cm less than the sum of the length of the equal sides. The sum of the length of the equal sides is 9 cm + 9 cm = 18 cm. Subtracting 3 cm from this gives us 15 cm as the length of the unequal side. To find the perimeter, we add up the length of all three sides: 9 cm + 9 cm + 15 cm = 33 cm.
Most Upvoted Answer
Length of one of the equal sides of an isosceles triangle is 9 cm. If ...
Given:
Length of one of the equal sides of the isosceles triangle = 9 cm
Length of the unequal side = sum of the length of equal sides - 3 cm
To find:
Perimeter of the triangle
Solution:
Perimeter is defined as the sum of the lengths of all the sides of a polygon. In the case of an isosceles triangle, it is the sum of the lengths of the two equal sides and the unequal side.
Let's denote the length of the unequal side as x cm.
From the given information, we can write the equation:
x = 9 + 9 - 3
x = 15 cm
Therefore, the length of the unequal side is 15 cm.
Perimeter of the triangle = length of equal side + length of equal side + length of unequal side
Perimeter = 9 cm + 9 cm + 15 cm
Perimeter = 33 cm
Therefore, the perimeter of the triangle is 33 cm.
Hence, the correct answer is option B) 33 cm.
Length of one of the equal sides of the isosceles triangle = 9 cm
Length of the unequal side = sum of the length of equal sides - 3 cm
To find:
Perimeter of the triangle
Solution:
Perimeter is defined as the sum of the lengths of all the sides of a polygon. In the case of an isosceles triangle, it is the sum of the lengths of the two equal sides and the unequal side.
Let's denote the length of the unequal side as x cm.
From the given information, we can write the equation:
x = 9 + 9 - 3
x = 15 cm
Therefore, the length of the unequal side is 15 cm.
Perimeter of the triangle = length of equal side + length of equal side + length of unequal side
Perimeter = 9 cm + 9 cm + 15 cm
Perimeter = 33 cm
Therefore, the perimeter of the triangle is 33 cm.
Hence, the correct answer is option B) 33 cm.
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Length of one of the equal sides of an isosceles triangle is 9 cm. If length of unequal side is 3 cm less than the sum of length of equal sides, find the perimetre of the triangle.a)30 cmb)33 cmc)36 cmd)39 cme)None of theseCorrect answer is option 'B'. Can you explain this answer?
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