1.

In a right-angled triangle ABC, right angled at B, AB =х2BC = x + 2 and AC = x + 3. Findvalue of x.​

Answer»

Step-by-step explanation:

Given : A triangle right angled at B.

AB=x−3,BC=x+4,AC=x+6

Thus, AC

2

=AB

2

+BC

2

(PYTHAGORAS THEOREM)

(x+6)

2

=(x−3)

2

+(x+4)

2

x

2

+12x+36=x

2

−6x+9+x

2

+8x+16

x

2

−10x−11=0

x

2

−11x+x−11=0

x(x−11)+1(x−11)=0

(x+1)(x−11)=0

x=11,−1

Neglecting the negative value, x=11

thus, AB=8 cm, AC=17 cm and BC=15 cm



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