Advanced Mathematics Primary 4 Angles

A triangle has two angles measuring 47° and 68°. What is the measure of the third angle?

A 65°
B 75°
C 115°
D 180°
Show Worked Solution

Worked Solution

Step 1: The angle sum property of a triangle: all three interior angles add up to 180°. Step 2: Add the two known angles: 47° + 68° = 115°. Step 3: Third angle = 180° − 115° = 65°. Step 4: Verify: 47° + 68° + 65° = 180°. ✓ Answer: 65°.

Correct answer: 65°

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