Question

 Two sides of parallelogram are in the 3:7 and its perimeter is 200 cm.The length of adjacent sides of parallelogram are: *



21cm, 49cm

25cm, 75cm

20cm, 80cm

30cm, 70cm
please don't write incorrect answer for point it is a request please please please For correct answer I will mark him or her as brainlist but after 6:30

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Answer 1

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THIS IS ONE EXAMPLE

step by step explanation

The length of two adjacent sides of a parallelogram are 17 cm and 12cm. one of its diagonals is 25 cm long. Find the area of the parallelogram. Also find the length of altitude from vertex to the side of length 12 cm.

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.