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CBSE Class 9 Answered

in a cyclic quadrilateral ABCD, if <A-<C=60, prove that the smaller of two is 60
 
Asked by Rishitha Reddy | 10 Mar, 2016, 09:05: PM
answered-by-expert Expert Answer
begin mathsize 12px style angle A space a n d space angle C space a r e space o p p o s i t e space a n g l e s space o f space t h e space c y c l i c space q u a d r i l a t e r a l. H e n c e comma space angle A plus angle C equals 180 degree G i v e n space t h a t comma space angle A minus angle C equals 60 degree 2 angle A equals 240 degree rightwards double arrow angle A equals 120 degree rightwards double arrow angle C equals 180 degree minus angle A equals 180 degree minus 120 degree equals 60 degree H e n c e comma space t h e space s m a l l e r space o f space t h e space t w o space a n g l e s space i s space 60 degree. end style
Answered by satyajit samal | 11 Mar, 2016, 01:28: PM

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CBSE 9 - Maths
AB is chord of a circle with centre O. Let P and T be two points on the circumpherence such that < APB # < ATB and < APB = 80 degree then what is the value of < ATB.
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Asked by sdmbotch1123 | 17 Dec, 2022, 09:39: PM
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CBSE 9 - Maths
if a segment contains more than two angles even then all of them will be equal?
Asked by nirup6957 | 20 Jan, 2020, 07:10: PM
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CBSE 9 - Maths
prove that a cyclic parallelogram is a rectangle
Asked by mukhreetyadav1972 | 29 Dec, 2019, 07:34: PM
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CBSE 9 - Maths
Prove that the opposite angles of a cyclic quadrilateral are supplementary.
Asked by Topperlearning User | 04 Oct, 2017, 02:06: PM
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CBSE 9 - Maths
begin mathsize 12px style In space the space given space figure comma space straight O space is space the space centre space of space the space circle space and space angle AOC space is space equal space to space 140 degree. space Find space angle ABC. end style
Asked by Topperlearning User | 05 Oct, 2017, 07:58: AM
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CBSE 9 - Maths
Prove that the quadrilateral formed by the bisectors of internal angles of a cyclic quadrilateral is also cyclic.
Asked by Topperlearning User | 04 Oct, 2017, 02:03: PM
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CBSE 9 - Maths
begin mathsize 12px style increment space ABC space and space increment space ADC space are space two space right space triangles space with space common space hypotenuse space AC. space Prove space that space angle CAD space is space equal space to space angle CBD. end style
Asked by Topperlearning User | 04 Oct, 2017, 02:09: PM
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CBSE 9 - Maths
In the figure, O is the centre of the circle and begin mathsize 12px style angle space AOC space equals space 160 degree. space Prove space that space 3 angle space straight y space minus space 2 angle space straight x space equals space 140 degree end style.
Asked by Topperlearning User | 04 Oct, 2017, 01:55: PM
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CBSE 9 - Maths
Asked by Topperlearning User | 04 Oct, 2017, 01:50: PM
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CBSE 9 - Maths
Error converting from MathML to accessible text.
Asked by Topperlearning User | 04 Oct, 2017, 02:12: PM
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