Page:The Rhind Mathematical Papyrus, Volume I.pdf/108

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Problem 50

Example of a round field of diameter 9 khet. What is its area?

Take away $1/undefined$ of the diameter, namely 1; the remainder is 8. Multiply 8 times 8; it makes 64. Therefore it contains 64 setat of land.

Do it thus:

this taken away leaves 8

Its area is 64 setat.

Problem 51

''Example of a triangle of land. Suppose it is said to thee, What is the area of a triangle of side 10 khet and of base'' 4 khet?

Do it thus:

Its area is 20 setat.

Take $1/undefined$ of 4, in order to get its rectangle. Multiply 10 times 2; this is its area.