Area of Plane Figures

Area of Plane Figures

by Teacher Fai

​AREA

​Units for Area

​Parallelogram

• Parallelogram has two pairs of parallel sides​

• ​Opposite sides are Equal

• ​Area = Base x Perpendicular Height

Multiple Choice

Area of Parallelogram =

• base x width

• base x height

• 1/2 x base x heigh

• 1/2 x base x width

Multiple Choice

Find the area of the rectangle

[Hint: Check the units]

• 10 cm

• $$7cm^2$$  

• $$10cm^2$$  

• 14 cm

Multiple Choice

Which of these numbers is the height?

• 3

• 5

• 2

Multiple Choice

What is the length of the base in this parallelogram?

• 1.8 m

• 2 m

• 2.5 m

Multiple Choice

Calculate the Area of the parallelogram

[Hint: Check the units]

• $$7m^2$$  

• $$8m^2$$  

• 8m

• 7m

Multiple Choice

Calculate the area of the square

[hint: check the units]

• 12m

• $$6m^2$$  

• $$9m^2$$  

• 9m

Multiple Choice

Calculate the area of the parallelogram

[hint: identify the height and its base]

• $$36\ m^2$$  

• $$18\ m^2$$  

• $$8\ m^2$$  

• $$13\ m^2$$  

Multiple Choice

What is the area of the parallelogram?

• 13 cm²

• 28.5 cm²

• 45.6 cm²

• 40 cm²

Poll

Do you understand what we have learnt about Area till now?

Multiple Choice

Choose the correct answer to find the area of parallelogram

• $$b\times h$$

• $$\frac{1}{2}\left(a+b\right)h$$

• $$l\times l$$

Multiple Choice

What is the area of the parallelogram?

[Hint: Height is  $$90^o$$  to its Base]

• 63 cm²

• 72 cm²

• 56 cm²

Multiple Choice

$$l\times l\$$  This formula is to find area of 

• square

• trapezium

• traingle

​Identify the Base and the Height

​Make sure you understand this example

​Let's Try.....

​Find the area of triangles using the formula

​

​Area =

Multiple Choice

How do you find the AREA of a TRIANGLE?

• Length x Width

• Base x Height divided by 2

• 1/3 (Length x width)

• Base x Height

Multiple Choice

Calculate the area of the triangle

[Hint: Watch out for the units]

• $$10\ cm^2$$  

• $$5\ cm^2$$  

• $$7\ cm^2$$  

• 5 cm

Multiple Choice

Calculate the area of the triangle.

[hint: Identify the correct height and its base]

• $$175\ cm^2$$  

• $$140\ cm^2$$  

• $$125\ cm^2$$  

• $$250\ cm^2$$  

Multiple Choice

Calculate the area of the triangle

[Hint: Choose the correct Height and Base]

• $$88\ cm^2$$  

• $$96\ cm^2$$  

• $$110\ cm^2$$  

• $$40\ cm^2$$  

Poll

I know how to calculate the Area of Triangle.

Poll

I followed the step to success given earlier by the teacher.

Poll

Do you understand on what we have learnt today?