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Question

Draw a circle, Identify a point on it. Cut arcs on the circle with the length of the radius in succession. How many parts can the circle be divided into? Give reason.

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Solution

Construction -

Step 1 : Draw a circle of radius R.

Step 2 : Take a point A on the circle .

Step 3 : Cut arcs on the circle with the length of the radius in succesion.

Step 4 : Mark an arcs as AB and join them together with a dotted line as well as with the centre C to form a triangle ABC.

Explanation : Now as we can see the sides of the triangle i.e. AB,BC and CA are of equal length that is R.Therefore , the triangle ABC is an equilateral triangle. Now we know that all angles of an equilateral triangle are of 60 degrees and only 6 such angles are sufficient to form a circle as we know a circle of 360 degrees.To form 6 such angles we need to draw 6 equilateral triangle or we can say we need to cut 6 arcs on the circle with each of length of the radius in seccesion.

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