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Question: The area of a triangle whose vertices are (1, –1), (–1, 1) and (–1, –1) is given by-...

The area of a triangle whose vertices are (1, –1), (–1, 1) and (–1, –1) is given by-

A

2

B

12\frac{1}{2}

C

1

D

3

Answer

2

Explanation

Solution

Area

D = 12\frac{1}{2} [x1(y2 – y3) + x2 (y3 – y1) + x3 (y1 – y2)]

D = 12\frac{1}{2} [1 (1 + 1) – 1(–1 + 1) – 1 (–1 – 1)]

D = 2