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1. ### Which postulate or theorem can you use to prove triangle AEC is congruent to triangle BED?

Congruence follows by the ASA (Angle-Side-Angle) Postulate.

1 Answers · Science & Mathematics · 26/08/2009

2. ### AB and CD are parallel segments. A&C are joined diagonally by E. What is the sum of angles BAE, AEC, & ECD?

If I can understand your instructions and have drawn the correct diagram then 2 pi.....BAC plus ACD yield pi and I believe you have a triangle AECA for the other pi.

1 Answers · Science & Mathematics · 09/12/2007

3. ### Trapezoid ABCD is such that AB is parallel to CD and the diagonals intersect at point E...?

you mean Triangle AEB, because AEC is a straight line... We can prove the 2 triangles are...

2 Answers · Science & Mathematics · 24/12/2010

AEC = ∠CEB since they are opposite, so: 5x - 20 = x + 50 4x = 70 x = 17.5 ∠CEB = 180 - ∠AEC = 180 - (x + 50) = 180 - 67.5 = 112.5

1 Answers · Science & Mathematics · 12/01/2008

AEC+AED=180 (since, it is a straight line) 3x+5x-60=180 8x=240 x=30 AEC=3x=90 AED=5x-60=90 AB is perpendicular to CD

2 Answers · Science & Mathematics · 27/04/2007

6. ### GEOMETRY HELP!!! (GEOMETRY OF THREE DIMENSIONS)?

ok so Triangle AEC is congruent to Triangle BED? each segment.... as in.... AE...

1 Answers · Science & Mathematics · 08/05/2012

7. ### How do you solve this problem using special segments of triangles?

wait AEC??? wer did E come from and are you give anymore info? ok so like...

3 Answers · Science & Mathematics · 22/11/2009

8. ### Solve two column proof?

1. <AEC cong <DEB Given 2. m<AEC...

4 Answers · Science & Mathematics · 13/10/2008

9. ### any smart people who actually get this stuff??? if so pwease help!?

1) m∠AEC = 1/2 arcAC = 22.5 m∠BAE = 1/2 arcBE = 45 m∠1 = m...

2 Answers · Science & Mathematics · 03/05/2010

10. ### Pls help:))) geometry?

since △AEC is Isosceles, then m ∠ 3 = m ∠ 4. since △ADC is...

1 Answers · Science & Mathematics · 23/12/2013