Question

write an activity to show the area of circle with diagram. ​

Answer 1

Answer:

Equipment: You will need a compass, pair of scissors, ruler and protractor for this activity.

Purpose: To discover a formula for the area of a circle.

Step 1: Using the compass, draw a circle of radius 7 cm. Then mark the circle's centre and draw its radius.

Step 2: Place the centre of the protractor at the centre of the circle and the zero line along the radius. Then mark every 30º around the circle.

Step 3: Using a ruler and a pencil, draw lines joining each 30º mark to the centre of the circle to form 6 diameters. The diagram thus obtained will have 12 parts as shown in the attachment.

Step 4: Colour the parts as shown in the attachment.

Step 5: Cut out the circle and then cut along the diameters so that all parts (i.e. sectors) are separated.

Step 6: Arrange all of the sectors to make a shape that approximates a parallelogram as shown in the attachment.

Step 7: Using a ruler, measure the base and the height of the approximate parallelogram obtained in Step 6.

hope this helps you.

Answer 2

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Step 1: Using the compass, draw a circle of radius 7 cm. Then mark the circle's centre and draw its radius.

Step 2: Place the centre of the protractor at the centre of the circle and the zero line along the radius. Then mark every 30º around the circle.

Step 3: Using a ruler and a pencil, draw lines joining each 30º mark to the centre of the circle to form 6 diameters. The diagram thus obtained will have 12 parts as shown below.

Step 4: Colour the parts as shown below.

Step 5: Cut out the circle and then cut along the diameters so that all parts (i.e. sectors) are separated.

Step 6: Arrange all of the sectors to make a shape that approximates a parallelogram as shown below.

Step 7: Using a ruler, measure the base and the height of the approximate parallelogram obtained in Step 6.