Question

area code f triangle whose vertices are (0,0),(2,3),(5,8) is ?
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Answer 1

Answer:

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Answer 2

Answer:

1/2

Here an easy method to calculate area of any convex polygon if you know coordinates of all its vertices.

Step 1: Write coordinates one below another in given order and then again write the first one.

eg. here,

(0,0)

(2,3)

(5,8)

(0,0)

Step 2: Multiply by criss cross method.

eg. {(0*3-0*2)+(2*8-3*5)+(5*0-8*0)}

=1

Step 3: Divide the answer by 2. That's your answer.

Note: Area cannot be negative, so if answer comes out to be negative, then multiply it by -1 to make it positive, then that will be your answer.