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sadie271
21.07.2019 •
Mathematics
The lengths of the bases of the right trapezoid are 9 cm and 18 cm. the length of a longer leg is 15 cm. find the area of the trapezoid.
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Ответ:
Firstly, we will draw figure
now, we will draw a altitude from B to DC that divides trapezium into rectangle and right triangle
because of opposite sides of rectangle ABMD are congruent
so,
DM=AB=9
CM=CD-DM
CM=18-9
CM=9
now, we can find BM by using Pythagoras theorem
now, we can plug values
we get
now, we can find area of trapezium
now, we can plug values
and we get
so, area of of the trapezoid is
..........Answer
Ответ: