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ICSE Class 9 Answered

Q 7
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Asked by Rayeesa | 06 Jun, 2018, 02:00: PM
answered-by-expert Expert Answer
In ΔACB,
AC = AB .......Given
begin mathsize 16px style angle ACB space equals space angle ABC.......... Isoscels space triangle.... left parenthesis straight i right parenthesis angle ACB thin space plus thin space angle BCF space equals space 180 degree space space space space space space space linear space pair angle ABC thin space plus thin space angle CBE space equals space 180 degree space space space space space space space linear space pair up diagonal strike angle ACB end strike thin space plus thin space angle BCF space equals up diagonal strike angle ABC thin space end strike plus thin space angle CBE space space space space from space left parenthesis straight i right parenthesis angle BCF space equals space angle CBE space 1 half angle BCF space equals space 1 half angle CBE angle BCD equals angle CBD space space space space space space space space space space space space space space space space space space space space space space space CD space and space BC space are space bisectors space of space angle BCF space and space angle CBE CD space equals space BD In space increment ACD space and space increment ABD CD space equals space BD AC space equals space AB AD space equals space AD space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space common space side increment ACD space almost equal to space increment ABD space space space space space space space space space space space space space space space space space space space space SSS space test angle CAD space equals space angle BAD space space space space space space space space space space space space space space space space space space space space straight c. space straight p space. space straight c. space straight t AD space bisects space angle straight A end style
Answered by Sneha shidid | 07 Jun, 2018, 10:49: AM

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ICSE 9 - Maths
In triangle ABC the internal bisector of angle A and the external bisector of angle C intersect each other at point O . Prove that 2 angle AOC = angle B . 
Asked by alonesuvam.123 | 27 Dec, 2023, 08:40: PM
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ICSE 9 - Maths
In triangle ABC , AB=AC=x BC=10cm. Area of Triangle ABC =60cm² then x=? What will be the answer among option a)12cm b)13cm c)14cm d) none? *Explain the process and method used.*
Asked by dola2408m | 04 Sep, 2021, 03:27: PM
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ICSE 9 - Maths
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Asked by rutvikbalekundri | 26 Jul, 2021, 09:00: AM
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ICSE 9 - Maths
In chapter triangles and isosceles triangles, is there any way to learn them easily?
Asked by sheetalgoel25 | 19 Oct, 2020, 06:11: PM
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ICSE 9 - Maths
The altitude drawn to the base of an isosceles triangle is 8 cm and the perimeter is 32 cm. Find the area of the triangle.
Asked by chsrvsh | 24 Jul, 2019, 09:29: PM
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ICSE 9 - Maths
In triangle ABC the bisector of angle ABC and ACB meet at O.If OB=OC prove that triangle ABC is an isosceles triangle.
Asked by rkarim957 | 14 Jul, 2019, 11:53: AM
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ICSE 9 - Maths
Q 7
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Asked by Rayeesa | 06 Jun, 2018, 02:00: PM
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ICSE 9 - Maths
Q 16
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Asked by Rayeesa | 06 Jun, 2018, 01:58: PM
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ICSE 9 - Maths
An isosceles triangle ABC has AC  =B,C. CD bisects AB at D and angle CAB = 55degree. Find :(1) angle DCB (2) angle CBD.  
Asked by evangelinexess393 | 02 Jan, 2018, 03:09: PM
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