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21 Jul 2021, 01:30
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
82% (00:41) correct
18%
(00:40)
wrong
based on 88
sessions
History
Date
Time
Result
Not Attempted Yet
In △ABC, what is ∠A ?
(1) △ABC is isosceles.
(2) ∠B = 45°
(1) △ABC is isosceles.
(2) ∠B = 45°
21 Jul 2021, 02:54
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Bunuel
Statement 1 : Insufficient
No measure about any angle.
Statement 2 : Insufficient
∠B = 45°, the angle A can have many values.
Combining both,
△ABC is isosceles and ∠B = 45°
If ∠A = ∠C, Then ∠A = 67.5°
If ∠A = ∠B, Then ∠A = 45°
If ∠B = ∠C, Then ∠A = 90°
Different values. Insufficient.
Hence, OA is (E).
21 Jul 2021, 03:13
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Statement (1) △ABC is isosceles.
No information about any angle
Statement (2) ∠B = 45°
No information about angle A
combined
45 degree is one of the other angles in an isosceles triangle
Not sufficient to know the measure of A
As A can be 45 degree or (180-45)/2 degrees
(E) is the answer IMO
No information about any angle
Statement (2) ∠B = 45°
No information about angle A
combined
45 degree is one of the other angles in an isosceles triangle
Not sufficient to know the measure of A
As A can be 45 degree or (180-45)/2 degrees
(E) is the answer IMO
Bunuel
