Explain the process of " Construction of equilateral triangle".
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follow the steps given below to construct the triangle.
1. Draw a line PQ and mark a point D on it.
2. Construct a perpendicular of length DA=5cm to PQ at point D
3. Construct ∠DAR=
2
60
0
=30
0
to intersect PQ at B
4. Measure BD and cut off an arc on PQ of same distance DC on the other side of D
5. Join A to C
6. ABC is the required equilateral triangle.
On measuring the length of the sides, we get side length as 5.8 cm
∴ Area of triangle =
2
1
×5.8×5=14.5 cm
2
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