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Labels for Geometry

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Labels for Geometry

A pop-up science trail needs clear labels for its shapes. Solve each challenge and use precise geometry vocabulary. Angles are measured in degrees (°).

Lines and angles

Use the descriptions below to answer Questions 1–2. Path A and Path B are parallel. A straight cross-path intersects both paths at right angles.

1.Which pair of paths is parallel: Path A and Path B, or Path A and the cross-path? Explain using the meaning of parallel.
2.The cross-path meets Path A at 90°. What is this angle called, and what is the relationship between the two paths?
3.A turning gate opens through 135°. Is this an acute, right, obtuse, straight or reflex angle? Give one reason.
4.Match each angle size to its correct label: 42°, 90°, 180°, 240°. Labels: acute, right, straight, reflex.
  • 42°
  • 90°
  • 180°
  • 240°
  • right
  • reflex
  • straight
  • acute

Triangles and quadrilaterals

Shape designers are checking that every label describes the shape accurately.

5.A triangular sign has three equal sides. What is the triangle called? What is the total of its interior angles?
6.A rectangle is 8 cm long and 5 cm wide. State two properties it must have, then calculate its perimeter.
7.A quadrilateral has four equal sides, but its angles are not all right angles. Which named quadrilateral could it be? Why is it not a square?
8.True or false: every square is also a rectangle. Explain your answer using a rectangle property.

Circle labels

The final trail feature is a circular viewing platform. Use the descriptions in the questions to solve the last challenges.

9.In a circle with centre O, name each segment: one joins O to a point on the circumference; one joins two points on the circumference and passes through O; and one joins two points on the circumference without passing through O.
10.The viewing platform has a radius of 4.5 m. What is its diameter? Show how you know.
11.Explain why a circle’s diameter is twice its radius. Include the centre in your explanation.

3 printable pages

  • Geometry field guide: parallel paths, perpendicular lines and angle types

    Page 1

  • Triangle and quadrilateral properties, including rectangles and rhombuses

    Page 2

  • Circle parts: radius, diameter, chord and circumference

    Page 3

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