Area and Perimeter Of Triangles,

Parallelograms And Trapezoids Worksheet
Lesson 1

Problem:

Determine the area and perimeter of the triangle.

    45.png      

Formula Review:

Perimeter of Triangles, Parallelograms, and Trapezoids = Sum of all sides

Area of Triangle = ½ x base x height

Area of Parallelogram = base x height

Area of Trapezoid = ½ x height x (base1 + base2)

Solution:

Step 1: Area of Triangle = ½ x base x height

= ½ x 5 x 4 = 10

= 10 cm2                   

 Step 2: Perimeter of Triangle = Sum of all sides

 

= 4 + 5 + 8 = 17

= 17 cm

 

The answer is:

 

Area of Triangle = 10 cm2

 

Perimeter of Triangle = 17 cm                                                        

Try two practice problems: Determine the area and perimeter.

  

A.
15.png

Area :

 

Perimeter:
B.
46.png

Area :

 

Perimeter:

 

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