The side BC of a triangle is produced, such that D is on ray BC. The bisector of ∠A meets BC in L. Prove that ∠ABC + ∠ACD = 2 ∠ALC.

The side BC of a triangle is produced, such that D is on ray BC. The bisector of $∠ A$ meets BC in L. Prove that $∠ A B C + ∠ A C D = 2 ∠ A L C$ .

Matching exercise

Match the items on the right to the items on the left.

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