Find the area with full explanation please . chp-mensuration
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Answers
Answer:
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Given:-
Octagon having eight equal sides each 7cm
Construction:-
Divided the octagon in 3 figures two are trapezium whose parallel sides are 19cm and 7 cm respectively and third figure is rectangle having length and breadth 19cm and 5cm.
Solution-
Area of two trapezium = 2×l/2(a+b)×h
=2×1/2(19+7)×4
=26×4
=104cm^2
Area of rectangle =l×b
=19×7
=133cm^2
So, Total area of octagon =104 +133
=237cm^2
Hope this helps uu.......
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Answer:
total area of octagon.
= 104 + 133
= 237cm²
Step-by-step explanation:
Given:
Octagon having eight equal sides each 7cm
construction:
Divid the octagon in 3 figure two are trapezium whose parallel side are 19cm and 7 cm respectively and third figure is rectangle having length are breadth 19cm and 5cm.
solutions:
Area of the trapezium
=2 × 1/2 ( a+ b) × h
= 2 × 1/2 ( 19+ 7) × 4
= 26 × 4
= 104cm²
Area of rectangle = l × b
= 19 × 7
= 133cm²
so, total area of octagon.
= 104 + 133
= 237cm²
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