What Is Perimeter?
Grade 3 · Math · Area and Perimeter · South Dakota, USA
Lesson Summary
Perimeter is the total distance around the outside of a shape. You find it by adding up all the side lengths.
Explanation
Imagine walking around the edge of a playground. The total distance you walk is the perimeter. To find the perimeter of any shape, add the lengths of all its sides together. For a triangle with sides of 3 cm, 4 cm, and 5 cm, the perimeter is 3 + 4 + 5 = 12 cm. Perimeter is measured in units of length like centimeters, meters, or inches.
Practice Questions
Q1: A square has sides of 5 cm each. What is its perimeter?
Answer: 20 cm, because 5 + 5 + 5 + 5 = 20.
Q2: A triangle has sides of 3 m, 4 m, and 5 m. What is its perimeter?
Answer: 12 m, because 3 + 4 + 5 = 12.
Q3: What does the word 'perimeter' measure?
Answer: The total distance around the outside edge of a shape.
People Also Ask
What is What Is Perimeter? in Grade 3 Math?+
What Is Perimeter? is a lesson in the Area and Perimeter chapter of Grade 3 Math. It is part of the South Dakota, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers What Is Perimeter??+
What Is Perimeter? is taught in Grade 3 as part of the Math curriculum in South Dakota, USA.
How can I help my child with Area and Perimeter in Math?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Area and Perimeter topics.