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The third side of the triangle if the perimeter of a triangle is 20m and two of its sides are 5m and 4m, is
- a)11 m
- b)10m
- c)12m
- d)5m
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The third side of the triangle if the perimeter of a triangle is 20m a...
Perimeter of a triangle =1stside+2ndside+3rd side So, 20=5+4+3rdside 3rdside=20−9=11m.
Most Upvoted Answer
The third side of the triangle if the perimeter of a triangle is 20m a...
Given:
- Perimeter of the triangle = 20m
- Two sides of the triangle = 5m and 4m
To find:
The third side of the triangle.
Solution:
Step 1: Perimeter of a triangle
The perimeter of a triangle is the sum of all its sides. In this case, the perimeter is given as 20m.
Perimeter = Side1 + Side2 + Side3
Step 2: Substitute the given values
Since two sides of the triangle are given as 5m and 4m, we can substitute these values into the perimeter formula.
20m = 5m + 4m + Side3
Simplify the equation:
20m = 9m + Side3
Step 3: Solve for the third side
To find the value of Side3, we need to isolate it on one side of the equation. We can do this by subtracting 9m from both sides of the equation.
20m - 9m = Side3
11m = Side3
Step 4: Conclusion
The third side of the triangle is 11m. Therefore, the correct answer is option A) 11m.
- Perimeter of the triangle = 20m
- Two sides of the triangle = 5m and 4m
To find:
The third side of the triangle.
Solution:
Step 1: Perimeter of a triangle
The perimeter of a triangle is the sum of all its sides. In this case, the perimeter is given as 20m.
Perimeter = Side1 + Side2 + Side3
Step 2: Substitute the given values
Since two sides of the triangle are given as 5m and 4m, we can substitute these values into the perimeter formula.
20m = 5m + 4m + Side3
Simplify the equation:
20m = 9m + Side3
Step 3: Solve for the third side
To find the value of Side3, we need to isolate it on one side of the equation. We can do this by subtracting 9m from both sides of the equation.
20m - 9m = Side3
11m = Side3
Step 4: Conclusion
The third side of the triangle is 11m. Therefore, the correct answer is option A) 11m.
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Community Answer
The third side of the triangle if the perimeter of a triangle is 20m a...
The answer to this question is a 11 cm
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