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Types And Angle Sum Property Free Doubts and Solutions

CBSE - IX - Mathematics - Quadrilaterals

In the given figure, 𝐴𝐵𝐶𝐷 is a quadrilateral and 𝐴𝑂 and 𝐷𝑂 are bisectors of ∠𝐴and ∠𝐷. The value of ′𝑥 ′ is

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Asked by gujarsurjeet007 9th February 2018, 8:33 PM
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CBSE - IX - Mathematics - Quadrilaterals

Solve question no. 22

Asked by vikasg13.hardware 29th December 2017, 11:44 AM
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CBSE - IX - Mathematics - Quadrilaterals

Please solve question no. 14 with proper explanation 

Asked by adityaahuja099 13th November 2017, 7:36 PM
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CBSE - IX - Mathematics - Quadrilaterals

Please solve question no 14 with proper explanation 

Asked by adityaahuja099 10th November 2017, 4:00 PM
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CBSE - IX - Mathematics - Quadrilaterals

The angles of a quadrilateral are in the ratio 3: 5: 9: 13. Find all the angles of the quadrilateral.

Asked by Topperlearning User 16th August 2017, 2:25 PM
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CBSE - IX - Mathematics - Quadrilaterals

In the figure, PQRS is a trapezium in which PQ  SR. if P = 55o and Q = 70o, find R andS.

Asked by Topperlearning User 16th August 2017, 2:24 PM
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CBSE - IX - Mathematics - Quadrilaterals

ABCD is a parallelogram. What special name will you give it if the following facts are known? (i) AB = AD (ii)DAB = 90o (iii) AB = AD and DAB = 90o

Asked by Topperlearning User 16th August 2017, 2:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

Prove that the sum of the interior angles of a quadrilateral is equal to 360o.

Asked by Topperlearning User 16th August 2017, 2:22 PM
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CBSE - IX - Mathematics - Quadrilaterals

The sides ML and ON of a quadrilateral are produced as shown in the figure. Prove that x + y = a + b

Asked by Topperlearning User 16th August 2017, 2:20 PM
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CBSE - IX - Mathematics - Quadrilaterals

How does a trapezium differ from a parallelogram?

Asked by Topperlearning User 16th August 2017, 2:19 PM
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CBSE - IX - Mathematics - Quadrilaterals

In the given figure, LMNQ is a parallelogram in which L = 75o and QMN = 60o. Find NQM and LQM.

Asked by Topperlearning User 16th August 2017, 2:19 PM
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CBSE - IX - Mathematics - Quadrilaterals

In the given figure, PQRS is a quadrilateral in which PQ is the longest side and RS is the shortest side. Prove that R > P.

Asked by Topperlearning User 16th August 2017, 2:17 PM
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CBSE - IX - Mathematics - Quadrilaterals

In a quadrilateral ABCD, the line segments bisecting C and D meet at E. Prove that A + B = 2 CED.

Asked by Topperlearning User 16th August 2017, 2:17 PM
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CBSE - IX - Mathematics - Quadrilaterals

Prove that the diagonals of a parallelogram bisect each other.

Asked by Topperlearning User 16th August 2017, 2:15 PM
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CBSE - IX - Mathematics - Quadrilaterals

ABCD is a cyclic quadrilateral and O is the centre if the circle. If angleBOD=160°, then find angleBPD

Asked by mkmishra101 2nd March 2016, 6:12 PM
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CBSE - IX - Mathematics - Quadrilaterals

E and F are respectively the mid points of non parallel sides AD, BC of a trapezium ABCD. Prove that EF || AB

Asked by Paresh 20th November 2015, 7:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

find the angle of a concave quatrilaterals with angle A =150, angleB=30 and angleC=37 find angle D

Asked by yogita 25th October 2015, 12:07 PM
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CBSE - IX - Mathematics - Quadrilaterals

The area of rhombus is 72 cm2. If an altitude of the rhombus is half of the corresponding base,determine the measure of each side of the rhombus.

Asked by singhaivk05 11th March 2015, 8:37 PM
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CBSE - IX - Mathematics - Quadrilaterals

Show that the line segments joining the mid points of opposite sides of a quardilateral bisect each other.

Asked by pkirankumar4321 23rd February 2015, 9:18 PM
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CBSE - IX - Mathematics - Quadrilaterals

ABCD is a square and on the side DC, an equilateral triangle is constructed. Prove that (i) AE = BE and (ii) DAE = 15o

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

The angles of a quadrilateral are in the ratio 3 : 5 : 9 : 13. Find all the angles of quadrilateral.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

ABCD is a parallelogram. If DAB = 60o and DBC = 80o find CDB.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

The angles of a quadrilateral are in the ration 3 : 5 : 9 : 13. Find all the angles of the quadrilateral.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

Prove that the quadrilateral formed (if possible) by the internal angle bisectors of any quadrilateral is cyclic.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - IX - Mathematics - Quadrilaterals

Asked by Topperlearning User 9th December 2013, 10:39 AM
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