Question

The figure below shows a square ABCD and an equilateral triangle DPC.
Ted makes the chart shown below to prove that triangle APD is congruent to triangle BPC.
What is the error in Ted’s proof?

Answer 1

@amistre64

Answer 2

@ParthKohli

Answer 3

@Agent_Sniffles

Answer 4

ok
the angel ADP=BCP=30 No =60

Answer 5

I think the 3rd line is close but still wrong.

the angles inside the equilateral triangle are 60
but the angles he picked out are 90-60= 30 not 60

Answer 6

all other is true

Answer 7

I never really understood proofs..... :(

Answer 8

a+c=b+d=90
a=b=60
=> c=d=30