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GRE Prep Club Team Member
Joined: 20 Feb 2017
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In the figure above, BC is 6 units long, m∠A = 70°, and m∠B
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23 Mar 2020, 23:23
23 Mar 2020, 23:23
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In the figure above, BC is 6 units long, \(m∠A = 70°\), and \(m∠B = 40°\). How many units long is AB?
(A) 5
(B) 6
(D) 7
(C) 8
(E) 9
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Re: In the figure above, BC is 6 units long, m∠A = 70°, and m∠B
[#permalink]
12 Feb 2021, 06:43
12 Feb 2021, 06:43
1
Let, Angle BCA be x
we know, sum of angles in a triangle is 180
i.e x + 40 + 70 = 180
x = 70
Now we know, Triangle ABC is an Isosceles triangle with Angle BAC = Angle BCA = 70
Therefore, AB = BC = 6
hence, option B
we know, sum of angles in a triangle is 180
i.e x + 40 + 70 = 180
x = 70
Now we know, Triangle ABC is an Isosceles triangle with Angle BAC = Angle BCA = 70
Therefore, AB = BC = 6
hence, option B
gmatclubot
Re: In the figure above, BC is 6 units long, m∠A = 70°, and m∠B [#permalink]
12 Feb 2021, 06:43
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