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19 Oct 2020, 00:15
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Difficulty:
5%
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Question Stats:
83% (01:07) correct
17%
(01:29)
wrong
based on 148
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In quadrilateral ABCD, what is the value of angle ADC?
(1) Angle BAD + Angle ABC + Angle BCD = 280
(2) Angle BAD + Angle ADC + Angle BCD = 300
(1) Angle BAD + Angle ABC + Angle BCD = 280
(2) Angle BAD + Angle ADC + Angle BCD = 300
19 Oct 2020, 00:26
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Sum of internal angles of quadrilaterals is 360
In quadrilateral ABCD
Angle BAD + Angle ABC + Angle BCD +angle ADC=360
(1) Angle BAD + Angle ABC + Angle BCD = 280
Angle ADC=360-280=80
SUFFICIENT
(2) Angle BAD + Angle ADC + Angle BCD = 300
Angle ABC=360-300=60
We cannot determine the other angles since the type of quadrilateral is not given. It may be a trapezoid or parallelogram.
INSUFFICIENT.
IMO CORRECT ANSWER IS A
Posted from my mobile device
In quadrilateral ABCD
Angle BAD + Angle ABC + Angle BCD +angle ADC=360
(1) Angle BAD + Angle ABC + Angle BCD = 280
Angle ADC=360-280=80
SUFFICIENT
(2) Angle BAD + Angle ADC + Angle BCD = 300
Angle ABC=360-300=60
We cannot determine the other angles since the type of quadrilateral is not given. It may be a trapezoid or parallelogram.
INSUFFICIENT.
IMO CORRECT ANSWER IS A
Posted from my mobile device
19 Oct 2020, 03:56
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Bookmarks
In quadrilateral ABCD
Angle BAD + Angle ABC + Angle BCD +angle ADC=360
Sum of angles is 360
(1) Angle BAD + Angle ABC + Angle BCD = 280
Angle ADC=360-280=80
(2) Angle BAD + Angle ADC + Angle BCD = 300
Not possible to find ADC here
Angle BAD + Angle ABC + Angle BCD +angle ADC=360
Sum of angles is 360
(1) Angle BAD + Angle ABC + Angle BCD = 280
Angle ADC=360-280=80
(2) Angle BAD + Angle ADC + Angle BCD = 300
Not possible to find ADC here
