Why were permanent settlements more advanced than hunter-gatherer societies? Improvements in farming were no longer necessary.
Hunter-gatherers did not trade with people in settlements.
People were able to specialize in activities other than farming.
Families had fewer children because there was less work to do.

What two criteria are needed for triangles to be similar

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.

Identify the number as a regional or irrational.explain. 291.87