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Q: A triangle has a perimeter of 42in the lengths of two sides of the triangle are 13in and 16in find the length of the third side?

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Find the perimeter by adding the lengths of the sides

The perimeter of a triangle is equal to the length of its three sides added together. If you do not know the lengths of the sides, there are many different mathematical techniques for discovering them.

-- Measure or calculate the length of each of its 3 sides. -- Add the lengths of its 3 sides. -- The sum is the perimeter of the triangle.

Add the lengths of the 3 sides to get the perimeter.

-- Make sure you have the lengths of all three sides -- Add up the lengths of all three sides to get the perimeter of the triangle.

is the sum of the lengths of the three sides.

It is the sum of the lengths of its sides.

A perimeter of a triangle is the sum of all three lengths on the sides.

The perimeter of a triangle is the distance around it. Add the lengths of the three sides to find the perimeter.

It is the sum of the lengths of the three sides. However, since all three sides are of the same length, the perimeter equals three times the length of any one side.

A square has not a length but a perimeter; this perimeter is the sum the sides lengths.

The perimeter of a triangle is the sum of the lengths of its three sides.

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