Perimeter and area bingo

Exercise and reference answers

Clues and terms

1. Clue

   Total length around the border of a shape.

   Item

   Perimeter

2. Clue

   The name for the perimeter of a circle.

   Item

   Circumference

3. Clue

   Ratio of circumference to diameter.

   Item

   Pi

4. Clue

   Chose the Greek symbol for that ratio in 1706.

   Item

   William Jones

5. Clue

   Half the perimeter, used in Heron's formula.

   Item

   Semi-perimeter

6. Clue

   Formula giving area from the three sides.

   Item

   Heron

7. Clue

   Found the area rule for a cyclic 4-gon in 628 CE.

   Item

   Brahmagupta

8. Clue

   Shape made by two congruent triangles.

   Item

   Parallelogram

9. Clue

   Part of a circle, set by the angle at the centre.

   Item

   Arc

Instructions

Read each clue and tap the term it describes.

Explanation