Question

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

Explanation:

Step1: Recall adjacent - angle definition

Adjacent angles share a common vertex and a common side.

Step2: Analyze each option

• For ∠FEC and ∠GHE: They don't share a common side or vertex.
• For ∠FEC and ∠IHJ: They don't share a common side or vertex.
• For ∠FEC and ∠DEH: They don't share a common side or vertex.
• For ∠FEC and ∠DEC: They share a common vertex E and a common side EC.

Answer:

∠FEC and ∠DEC