HOTS Mathematics Primary 6 Geometry

PQRS is a rhombus. ∠PQR = 68°. Which of the following correctly lists all four interior angles (∠PQR, ∠QRS, ∠RSP, ∠SPQ) in order?

A 68°, 112°, 68°, 112°
B 68°, 68°, 112°, 112°
C 68°, 112°, 112°, 68°
D 68°, 112°, 112°, 112°
Show Worked Solution

Worked Solution

Step 1: Recall rhombus angle properties. • Opposite angles are equal. • Adjacent angles are supplementary (add to 180°). Step 2: Find ∠QRS (adjacent to ∠PQR). ∠QRS = 180° − 68° = 112° Step 3: Find ∠RSP (opposite ∠PQR). ∠RSP = 68° Step 4: Find ∠SPQ (opposite ∠QRS). ∠SPQ = 112° Step 5: Verify total. 68° + 112° + 68° + 112° = 360° ✓ Four angles in order: 68°, 112°, 68°, 112°

Correct answer: 68°, 112°, 68°, 112°

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