Draw a line AB. Place the centre of the protractor on point A. Coincide AB with the protractor line. Mark C=70. Join AC.
Constructing its copy:
Step 1: Draw another line DE.
Step 2: From O, draw an arc cutting at F and G.
Step 3: Draw arc using the compass with the above arc length, placed at D as centre.
Step 4: Measure GF. Using the same compass length place the point at I and cut the arc.
Step 5: using a ruler draw a line through the cut to get DK. Measure angle KDE using a protractor.
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