How to do the 3rd and 4th question
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nayanacs999:
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3). x+20°+2x-20°+60°=180°(straight line is 180°)
3x+60°=180°
3x=180°-60°
3x=120°
x=120/3
x=40°
therefore 2x-20°= CD
2(40°)-20°=CD
80°-20°=60°=CD
3x+60°=180°
3x=180°-60°
3x=120°
x=120/3
x=40°
therefore 2x-20°= CD
2(40°)-20°=CD
80°-20°=60°=CD
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