5.If (-3 ,1) , (1 ,-3 ) and (2 ,3 ) then the area of triangle is *
a) 14 sq.units
b) 7 sq.units
c) 28 sq.units
d) 35 sq.units
Answers
Answer:
a) 14 sq. units
Step-by-step explanation:
Given that vertices of a triangle is (-3 ,1) , (1 ,-3 ) and (2 ,3). We need to find out the area of triangle.
Now,
Area of triangle whose vertices is in the form (x1, y1), (x2, y2) and (x3, y3) is given by formula 1/2 [x1 (y2 - y3) + x2 (y3 - y1) + x3 (y1 - y2)]
Where the value of x1 is -3, x2 is 1 and x3 is 2. Similarly, value of y1 is 1, y2 is -3 and y3 is 3.
Substitute the values,
= 1/2 [-3 (-3 - 3) +1(3 - 1) + 2(1 + 3)]
= 1/2 [-3 (-6) + 1(2) + 2(4)]
= 1/2 (18 + 2 + 8)
= 1/2 × 2 (9 + 1 + 4)
= 14
Therefore, the area of triangle is 14 sq. units.
Answer:
a) 14 sq. units
Step-by-step explanation:
Given that vertices of a triangle is (-3 ,1) , (1 ,-3 ) and (2 ,3). We need to find out the area of triangle.
Now,
Area of triangle whose vertices is in the form (x1, y1), (x2, y2) and (x3, y3) is given by formula 1/2 [x1 (y2 - y3) + x2 (y3 - y1) + x3 (y1 - y2)]
Where the value of x1 is -3, x2 is 1 and x3 is 2. Similarly, value of y1 is 1, y2 is -3 and y3 is 3.
Substitute the values,
= 1/2 [-3 (-3 - 3) +1(3 - 1) + 2(1 + 3)]
= 1/2 [-3 (-6) + 1(2) + 2(4)]
= 1/2 (18 + 2 + 8)
= 1/2 × 2 (9 + 1 + 4)
= 14
Therefore, the area of triangle is 14 sq. units.
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your ans was again gone
sed
Sorry meri vajh se aap ko itni warning mil gyi
Step-by-step explanation: