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Is ABDC a square? (1) BC is perpendicular to AD. (2) BE = EC

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Math Expert
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V
Joined: 02 Sep 2009
Posts: 42327

Kudos [?]: 133105 [0], given: 12410

Is ABDC a square? (1) BC is perpendicular to AD. (2) BE = EC [#permalink]

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New post 17 Oct 2017, 23:44
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

72% (00:33) correct 28% (00:30) wrong based on 29 sessions

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Kudos [?]: 133105 [0], given: 12410

Manager
Manager
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S
Joined: 05 Dec 2016
Posts: 232

Kudos [?]: 25 [0], given: 48

Concentration: Strategy, Finance
GMAT 1: 620 Q46 V29
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Re: Is ABDC a square? (1) BC is perpendicular to AD. (2) BE = EC [#permalink]

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New post 18 Oct 2017, 03:08
(1) no info about side dimensions
(2) no info about angles
(1) + (2)
ABCD can still be rhombus either square taking both conditions are valid.

Answer E.

Kudos [?]: 25 [0], given: 48

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B
Joined: 09 Aug 2017
Posts: 59

Kudos [?]: 8 [0], given: 18

Location: United States
Concentration: Technology
GMAT 1: 640 Q44 V33
GMAT 2: 630 Q47 V29
WE: Research (Investment Banking)
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Re: Is ABDC a square? (1) BC is perpendicular to AD. (2) BE = EC [#permalink]

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New post 23 Oct 2017, 18:19
E
St1, we are missing information about the sides.
St2, It could still be a rhombus if the two diagonals are perpendicular.
_________________

I'd love to hear any feedback or ways to improve my problem solving. I make a lot of silly mistakes. If you've had luck improving on stupid mistakes, I'd love to hear how you did it.

Also, I appreciate any kudos.

Kudos [?]: 8 [0], given: 18

Re: Is ABDC a square? (1) BC is perpendicular to AD. (2) BE = EC   [#permalink] 23 Oct 2017, 18:19
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Is ABDC a square? (1) BC is perpendicular to AD. (2) BE = EC

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