WAEC Mathematics questions: Euclidean geometry

26 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Euclidean geometry· WAEC

   Each exterior angle of a regular polygon is 36°. How many sides has the polygon?

   • A8
   • B9
   • C12
   • D10

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2. Question 22· Euclidean geometry· WAEC

   Each interior angle of a regular octagon is

   • A45°
   • B120°
   • C140°
   • D135°

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3. Question 23· Euclidean geometry· WAEC

   In triangle PQR, angle P = 47° and angle Q = 68°. Find angle R.

   • A115°
   • B75°
   • C65°
   • D55°

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4. Question 24· Euclidean geometry· WAEC

   Each interior angle of a regular polygon is 150°. How many sides has it?

   • A10
   • B12
   • C15
   • D8

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5. Question 25· Euclidean geometry· WAEC

   In a cyclic quadrilateral PQRS, angle P = 75°. Find angle R.

   • A75°
   • B115°
   • C105°
   • D15°

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6. Question 26· Euclidean geometry· WAEC

   Vertically opposite angles are

   • Aequal
   • Bsupplementary
   • Ccomplementary
   • Dright angles

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