1.

Angle a-b=15 and angle b-c=15 find the angle

Answer»

/_ A - /_ B = 15°
/_ A = 15 + /_ B


/_ B - /_ C = 15
/_B = 15 + /_C





Sum of all ANGLES = 180°

=> /_A + /_B + /_C = 180°

=> 15 + /_B + /_B + /_C = 180

=> 15 + 15 + /_C + 15 + /_C + /_C = 180


=> 45 + 3 /_C = 180

=> /_ C = 135/3

=> /_C = 45°






Angles are ;

/_B = 15 + /_C
/_B = 15 + 45
/_B = 60°


/_A = 15 + /_B
/_A = 15 + 60
/_A = 75






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