The length of one side of a triangle is 3cm 8mm, the second side is 7mm longer than the first, and the third side is 1cm 2mm longer than the second. What is the sum (perimeter) of all three sides of this triangle?
To solve this task, you need to convert centimeters to millimeters. 1 centimeter = 10 millimeters. 3 cm 8 mm = 3 * 10 + 8 = 38 mm. 1 cm 2 mm = 1 * 10 + 2 = 12 mm. Let’s calculate what the second side is.
38 + 7 = 45 mm.
Let’s calculate what the third party is equal to.
45 + 12 = 57 mm.
Let’s calculate what the perimeter of the triangle is.
38 + 45 + 57 = 140 mm = 14 cm.
Answer: 14 centimeters.
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