The trunk of a tree has diameter 30 cm. During the following year, the circumference grew 6 cm. (i) Approximately, how much did the tree’s diameter grow? (ii) What is the percentage increase in area of the tree’s cross-section?

The trunk of a tree has diameter 30 cm.
During the following year, the circumference
grew 6 cm. (i) Approximately, how much did
the tree’s diameter grow?
(ii) What is the percentage increase in area of
the tree’s cross-section?

Matching exercise

Match the items on the right to the items on the left.

Step - 1

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Step - 5