Standard Mathematics Primary 6 Geometry

In the figure, ABCD is a parallelogram. The diagonal AC is drawn. ∠ACD = 42° and ∠DAC = 33°. Find ∠BAD.

A 33°
B 42°
C 75°
D 105°
Show Worked Solution

Worked Solution

Step 1: Since AB ∥ DC, alternate interior angles formed by transversal AC are equal. Therefore ∠BAC = ∠ACD = 42°. Step 2: ∠BAD is split by diagonal AC into ∠BAC and ∠DAC. ∠BAD = ∠BAC + ∠DAC = 42° + 33° = 75°. Answer: 75°

Correct answer: 75°

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