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The length of one side of a parallogram is 25 cm and its height is 18 cm find its area. |
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Answer» ONG>Answer: Area of triangle = s(s−a)(s−b)(s−c)
Area of PARALLELOGRAM=2× Area of triangle formed by the adjacent sides and the diagonal Sides are 17cm,12cm,25cm Semi perimeter(s)= 2 12+17+25
= 2 54
=27cm Area = 27(27−12)(27−17)(27−25)
⇒A= 27⋅15⋅10⋅2
⇒A= 3×3×3×3×5×2×5×2
⇒A=3×3×5×2 ⇒A=90cm 2
∴ Area of parallelogram =2(90)=180cm 2 . H=?; b=12cm A=b×h ⇒180=12×h ⇒ 12 180
=h ∴h=20cm ∴ LENGTH of altitude =h=20cm. |
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