๐๐๐ Using Graph Paper to construct shape and finding the Area ๐๐๐
Welcome๐ฆ๐งboys and girls to another fun Mathematics class. Today we will be going on an adventure where we will be exploring the topic " Using Graph Paper to find the area of polygons".
1. What is the formula to find the area of the rectangle? ๐Example:
1. What is the area of the rectangle below?
2.What is the formula to find the area of the square?
Example:
What is the area of the square below?
3.What is the formula to find the area of the triangle?
Example of how to use the graph paper to construct shape and find their area.
Example 1:
NB: Changing foot to cm
Length x Width
Length == 13cm
width = 10cm
Area= 13 x 10 = 130cm square
Example 2:
Side X side
Area= 12m x 12m= 144m square
Ok๐ฆ๐งboys and girls let us click and watch the video clips below to give us additional information on how to use graph paper to find the area of the shapes.
Click and watch Click and watch
Ready๐ฆ๐งboys and girls. It's now activities time.
Task 1:
Find the area and perimeter of the
figures below.
Task 2:
1.A rectangular
playfield has an area of 14 cm2. Use the grid below to sketch the playfield. Calculate
the perimeter of the playfield.
What is the area of the playfield?
2.A perfectly square fish tank has an area of 16 cm2. Use the grid below to draw the fish tank.
Find the perimeter and area of the fish tank.
Each represent 1cm2.
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Task 3:
Use the grid below to do the
following questions.
1. a. A rectangular playfield has an area of 40cm2. Use the grid below
to sketch the playfield.
a. b. Calculate the area and perimeter of the playfield.
A c. A perfectly square fish tank has an area of 16cm2. Use the grid below to draw the fish tank. Find the perimeter and area of the fish tank.
Each represent 1cm2.
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