1C_1 Geometry Revision

Which of the following is NOT a polyhedron?

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If a pyramid is cut along the direction as shown in the figure, what is the shape of its cross-section?

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Which of the following has / have both plane(s) and curved surface(s)?

• I only

• I and III only

• II and III only

• I, II and III

Which of the following does NOT have any curved surfaces?

• Circular cone

• Cylinder

• Sphere

• Tetrahedron

Which of the following is a pair of parallel lines?

• EF and GH

• EF and AB

• CD and GH

• AB and CD

A wire of length 34 cm is cut into two parts, and these two parts are bent into a square of side (x +1) cm and a regular hexagon of side x cm. Find the perimeter of the square.

• 3 cm

• 4 cm

• 16 cm

• 18 cm

Which of the following must be correct?

I. An equiangular polygon is a regular polygon.

II. A regular polygon is an equilateral polygon.

III. The radius of a circle is half the length of the diameter of the circle.

• II only

• I and III only

• II and III only

• I, II and III

Which of the following are concave polygons?

• I and II only

• I and III only

• II and III only

• I, II and III

Which of the following descriptions of a convex polygon must be correct?