Home > Math Topics > Geometry >

## Area and Perimeter of Triangles, Parallelograms and Trapezoids

#### Grade 4 Measurement - 4.MD.A.3

How to Find the Area and Perimeter of Triangles, Parallelograms and Trapezoids - The goal of this topic is to help you easily calculate the area and perimeter of different polygons such as Triangles, Parallelograms and Trapezoids. Let's cover the basic so that you are able to at least solve easier problems on your own. A Perimeter of any geometric figure is the distance around it, or the sum of all its sides. For instance, if you have to calculate sides of a square you simply multiply one of the sides by four. Area of a Parallelogram is the product of its length of base b and height h. It is written as: A = b.h Area of a Triangle is the half of the length of base b multiplied by the height h. It is written as: A = 1/2.b.h = bh/2. Area of a trapezoid is half the product of the height and sum of all the length of its parallel sides, or product of height and average length of the bases: It is written as: A = 1/2.b.(b1 + b2) = [h. (b1 + b2)] / 2. These lessons and worksheets will help students quickly understand how to find the area and perimeter of these three geometric shapes.

### Printable Worksheets And Lessons  #### Homework Sheets

Time to go all geometry Ninja on us. We give a whole bunch of unique shapes to work with.

• Homework 1 - Perimeter of this triangle = AB + BC + CA
• Homework 2 - Perimeter of this particular rectangle = AB + BD + DC + CA
• Homework 3 - Perimeter = 2 x base + 2 x height

#### Practice Worksheets

The focus of these is on triangles and trapezoids.

#### Math Skill Quizzes

These problems are set up in more of a mechanical setting.

• Quiz 1 - Area of a parallelogram = base x height
• Quiz 2 - These are some larger shapes.
• Quiz 3 - This triangle is a monster.