Mounds ABDEG

Other right angled triangles

 

 

Angles can change depending on where in a mound the measurement is made from. E and G are somewhat ambiguous. There is an apparent peak on E and the center of G to measure from.

The triangle DEA would not appear to be Isosceles.

Angles

AEG 90
BAE 90
EAG 35
AEB 35
AGE 65
ABE 65
ABD 90.5
DAG 89
AGD 37
BAD 36
EAD 54
DEA 57