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CBSE Class 9 Answered

if an angle of parallelogramis four -fifths of its adjacent angle,find the angles of parallelogram
Asked by dev | 08 Nov, 2014, 09:44: PM
answered-by-expert Expert Answer
L e t space x space a n d space y space b e space t h e space a d j a c e n t space a n g l e s space o f space a space p a r a l l e log r a m. G i v e n space t h a t space x equals space 4 over 5 y A l s o comma space w e space k n o w space t h a t space t h e space a d j a c e n t space a n g l e s space o f space a space p a r a l l e log r a m space a r e space s u p p l e m e n t a r y. T h e r e f o r e comma space w e space h a v e x plus y equals 180 degree rightwards double arrow 4 over 5 y plus y equals 180 degree rightwards double arrow fraction numerator 4 y plus 5 y over denominator 5 end fraction equals 180 degree rightwards double arrow 9 y equals 900 degree rightwards double arrow y equals 100 degree x equals 4 over 5 cross times 100 degree equals 80 degree T h u s space t h e space a n g l e s space o f space t h e space p a r a l l e log r a m space a r e comma space 100 degree comma space 80 degree comma space 100 degree space a n d space 80 degree
Answered by Vimala Ramamurthy | 09 Nov, 2014, 03:00: PM

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CBSE 9 - Maths
if the diagonals of a parallelogram are equal then show that it is a rectangle
Asked by priyankaubelal | 05 Mar, 2020, 10:25: PM
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CBSE 9 - Maths
If an angle of a parallelogram is two thirds of its adjacent angle find the angle of a parallelogram .
Asked by agarwalsenterprises | 19 Feb, 2020, 07:08: PM
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CBSE 9 - Maths
In the figure ABCD is a parallelogram in which DAB = 80o and DBC = 60o. Calculate CDB and ADB.
Asked by Topperlearning User | 09 Dec, 2013, 01:37: AM
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CBSE 9 - Maths
Find the measure of each angle of a parallelogram, if one of its angles is 30o less than twice the smallest angle.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 9 - Maths
In the given figure, PN and RM are perpendiculars to the diagonal QS of a parallelogram PQRS. Prove that PNS RMQ and PN = RM.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 9 - Maths
ABCD is a parallelogram in which X and Y are the mid points of AB and DC respectively. If AY and DX intersect in P while CX and BY intersect in Q, show that quadrilateral PXQY is a parallelogram.
Asked by Topperlearning User | 09 Dec, 2013, 02:35: AM
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CBSE 9 - Maths
LMNO is a parallelogram. Compute the values of x and y.
Asked by Topperlearning User | 09 Dec, 2013, 01:39: AM
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CBSE 9 - Maths
Characterize the following statements a TRUE or FALSE and give reason for your answer. If a pair of adjacent sides of a parallelogram is equal, it must be a rhombus or a square.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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CBSE 9 - Maths
In a parallelogram ABCD, prove that the sum of any two consecutive angles is 180o.
Asked by Topperlearning User | 09 Dec, 2013, 01:40: AM
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CBSE 9 - Maths
In a ABC median AD is produced to X such that AD = DX. Prove that ABXC is a parallelogram.         
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
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