# Area and Perimeter of Triangles, Parallelograms, and Trapezoids Worksheets

How to Find Area and Perimeter of Triangle, Parallelogram, and Trapezoid? The perimeter of a shape is the length of its boundary, usually measured in the same units as that of length. Perimeter is measured in m, cm, mm. The area is the measurement of the area enclosed by the plane region. Area is measured in square units Area and Perimeter of the Triangle - For a triangle, we can find the perimeter by adding the lengths of its three sides. P = (a + b + c). Where a, b, and c are the three sides of a triangle. Area of the triangle is the space occupied by the shape. Area of the triangle is half the area of the rectangle. A = 1/2 (l x w). Where l is the length of the sides, and w is the width of the triangle. Area and Perimeter of Parallelogram - A parallelogram is a quadrilateral that has two parallel opposite sides. In a parallelogram, the two opposite sides and the angles are congruent, while the consecutive angles are supplementary. To find the area of a parallelogram, we have the formula: A = b x h. Where b is the base length, and h is the height. The perimeter of a parallelogram is the sum of its all four sides. P = a + b + c + d. Where a, b, c, and d are the four sides of the parallelogram. Area and Perimeter of Trapezoid - A trapezoid is a quadrilateral with one pair of parallel sides. The non-parallel sides of the trapezoid are known as the legs, and the parallel sides are known as the bases. The area of the trapezoid is calculated by the formula: A = 1/2 (b1 + b2) x h. Where b1 and b2 are the bases, and h is the height of the trapezoid. The perimeter of a trapezoid is the sum of all four sides. P = a + b + c + d. Where a, b, c, and d are the four sides of the trapezoid.

• ### Basic Lesson

Guides students through process of determine the area and perimeter of a triangle.

• ### Intermediate Lesson

Students learn step by step how to gauge the area and perimeter of a parallelogram and trapezoid.

• ### Independent Practice 1

A really great activity for allowing students to understand the concepts of Area and Perimeter of Triangles, Parallelograms, and Trapezoids.

• ### Independent Practice 2

Students determine the area and perimeter of various shapes. Determine the area and perimeter of the triangles, parallelograms, and trapezoids. All units are in centimeters. The answers can be found below.

• ### Independent Practice 3

A really great activity for allowing students to understand the concepts of Area and Perimeter of Triangles, Parallelograms, and Trapezoids.

• ### Independent Practice 4

Reviews all skills in this unit. The answers can be found below.

• ### Homework Worksheet

Students are provided with 12 problems to achieve the concepts of Area and Perimeter of Triangles, Parallelograms, and Trapezoids. An example is also provided.

• ### Skill Quiz

This tests the students ability to understand Area and Perimeter of Triangles, Parallelograms, and Trapezoids.

• ### Homework and Quiz Answer Key

Answers for the homework and quiz.

• ### Lesson and Practice Answer Key

Answers for both lessons and both practice sheets.

#### Popular Shapes For Sure

"Everything in nature adheres to the cone, the cylinder and the cube." Paul Cézanne (1839-1906) French artist, Post-Impressionist who, as the following quote suggests, "...is the Father of us all" inspired Matisse and Picasso and many others.