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kiruha [24]
3 years ago
14

What is the area of trapezoid ABCD ? Enter your answer as a decimal or whole number in the box. Do not round at any steps. units

²

Mathematics
1 answer:
lidiya [134]3 years ago
7 0

Answer:

37.5 sq. units.

Step-by-step explanation:

The coordinate of vertices of trapezoid ABCD are given,

From the diagram it is clear the area of ABCD = \frac{1}{2}\times AB \times (AD + BC) {Since, AD ║ BC and AB is the perpendicular distance between the parallel lines }

Now, AB = \sqrt{(- 3 - 1)^{2}+ (2 - 5)^{2}  } = 5 units

AD = \sqrt{(- 3 - 0)^{2}+ (2 - (-2))^{2}  } = 5 units

Again, BC = \sqrt{(1-7)^{2}+ (5 - (-3))^{2}  } = 10 units

Therefore, the area of trapezoid ABCD = \frac{1}{2} (10 + 5) \times 5 = 37.5 sq. units. (Answer)

We know, that the distance formula between two points (x_{1}, y_{1}) and  (x_{2}, y_{2}) is  

\sqrt{(x_{1} - y_{1} )^{2} + (x_{2} - y_{2} )^{2}  }.

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