Question : The area of triangle with vertices A(0, 8), O(0, 0), and B(5, 0) is:
Option 1: 8 sq. units
Option 2: 13 sq. units
Option 3: 20 sq. units
Option 4: 40 sq. units
Correct Answer: 20 sq. units
Solution :
Let (x
1,
y
1
) = (0, 8)
(x
2,
y
2
) = (0, 0)
(x
3,
y
3
) = (5, 0)
Area of a triangle with vertices (x
1
, y
1
), (x
2
, y
2
), and (x
3
, y
3
)
=
=
=
= 20 sq. units
Hence, the correct answer is 20 sq. units.
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