Question

• In Fig. 13.115, ABCD is a rectangle in which diagonal AC is produced to e if
angle ECD = 146°, find angle AOB.​

Answer 1

Answer:

56+X+90=180

180÷2=90

therefore angle aob=90

Answer 2

Answer:

Step-by-step explanation;

angle DCO+DCE=180(Linear pair)

angle DCO=180-146=34

angle CDO = angle DCO (Diagonals bisection )

angle DCO=34 angle DOC=34+34+ angle DOC=180(Angle SumProperty)

angle DOC=112

Hence,

Angle AOB=Angle DOC(vertically opposite Angles)

DONE!!!