Question

which angles are adjacent angles? ∠fec and ∠ihe ∠ihj and ∠ghe ∠ghe and ∠fec ∠dec and ∠fec

Explanation:

Step1: Recall adjacent - angle definition

Adjacent angles share a common vertex and a common side, and they do not overlap.

Step2: Analyze each option

• For ∠FEC and ∠IHE: They do not share a common vertex or side.
• For ∠IHJ and ∠GHE: They do not share a common vertex or side.
• For ∠GHE and ∠FEC: They do not share a common vertex or side.
• For ∠DEC and ∠FEC: They share the common vertex E and the common - side EF.

Answer:

∠DEC and ∠FEC