Question

If the area of the triangle with vertices (0,0),(1,0),(0,a) is 12 sq units then find the value os a?

Answer 1

Answer:

Area of triangle =

2

1

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

x

1

0

0

1

2

1

1

1

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

∣

=4

⇒∣x(1−2)−1(0−2)+0∣=8

⇒∣−x+2∣=∣x−2∣=8

⇒x−2=±8⇒x=±8+2=−6,10t

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