In a ∆ abc angle a = x°angle b=y° and angle c=(y+20)° if 4x-y =10 show that the triangle is a right angled triangle
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a+b+c=180
Step-by-step explanation:
put the value of all alfabets
x+Y+(Y+20)=180
X+2Y+20=180
x+2y=180-20
x+2y=160
X=160-2Y
X=2 (80-Y)
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