Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 9 Answered

Captionless Image
Asked by rutvikbalekundri | 26 Jul, 2021, 09:00: AM
answered-by-expert Expert Answer
Q: In the following figure, AC = CD, AD = BD and angle C = 38o. Find angle CAB.
Sol:
In space increment ACD comma
angle ACD space plus space angle DAC space plus thin space angle ADC space equals space 180 to the power of straight o
rightwards double arrow 38 to the power of straight o space plus space straight x space plus space straight x space equals space 180 to the power of straight o space space space.... space left parenthesis As space AC space equals space CD right parenthesis
rightwards double arrow space 2 straight x space equals space 180 to the power of straight o minus 38 to the power of straight o
rightwards double arrow space straight x space equals space 71 to the power of straight o
rightwards double arrow space angle DAC space equals thin space angle ADC equals 71 to the power of straight o
Now comma space angle ADB space equals thin space 180 to the power of straight o space minus space angle ADC
rightwards double arrow space angle ADB space equals thin space 109 to the power of straight o
In space increment ADB comma
angle ADB space plus space angle ABD space plus thin space angle DAB space equals space 180 to the power of straight o
rightwards double arrow 109 to the power of straight o space plus space straight y space plus space straight y space equals space 180 to the power of straight o space space space.... space left parenthesis As space AD space equals space DB right parenthesis
rightwards double arrow space 2 straight y space equals space 180 to the power of straight o minus 109 to the power of straight o
rightwards double arrow space straight y space equals space 35.5 to the power of straight o
rightwards double arrow space angle ABD space equals thin space angle DAB space equals space 35.5 to the power of straight o
As space angle CAB space equals space angle CAD space plus thin space angle DAB
rightwards double arrow space angle CAB space equals space 71 to the power of straight o space plus space 35.5 to the power of straight o space equals space 106.5 to the power of straight o
Answered by Renu Varma | 26 Jul, 2021, 11:40: AM
ICSE 9 - Maths
Captionless Image
Asked by rutvikbalekundri | 26 Jul, 2021, 09:00: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Asked by sheetalgoel25 | 19 Oct, 2020, 06:11: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Asked by rkarim957 | 14 Jul, 2019, 11:53: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Q 7
question image
Asked by Rayeesa | 06 Jun, 2018, 02:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Asked by Rayeesa | 06 Jun, 2018, 01:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Maths
Asked by evangelinexess393 | 02 Jan, 2018, 03:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×