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ICSE Class 10 Answered

Circles Class 10๐Ÿ‘‡๐Ÿ‘‡
question image
Asked by ayush421301 | 26 Jan, 2020, 06:06: PM
answered-by-expert Expert Answer
Given:  Measure of angle AOC = 100o  and  Measure of angle AOB = 140o 
To find the measure of an angle BAC

E x t e r i o r space angle B O C equals angle A O C plus angle A O B plus 100 degree plus 140 degree equals 240 degree
therefore space m angle B O C equals 360 degree minus E x t space angle B O C equals 360 degree minus 240 degree equals 120 degree
B y space s u b t e n d e d space a n g l e space t h e o r e m comma
angle B A C equals 1 half open parentheses angle B O C close parentheses equals 1 half cross times 120 degree equals 60 degree
Answered by Renu Varma | 27 Jan, 2020, 10:54: AM

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