YES, if they have the same radius.
The circle's diameter
Usually it is two semi-circles with straight stretches "inserted" between them. If the semicircles have radius r units, and the length of the straight sections is s units then Area = pi*r2 + 2r*s square units.
Polygon
2, because semi means half.
YES, if they have the same radius.
It is 125.6 square yards, approx.
Its diameter
yes * * * * * No, they do not tessellate.
The semicircles on a weather map symbol for a warm front indicate the direction in which the warm air is moving. The semicircles point in the direction the front is moving, showing that warmer air is replacing cooler air as the front passes.
The circle's diameter
The average velocity of a unicycle going around semicircles would be zero if it starts and ends at the same point, since the displacement is zero. If it starts and ends at different points, the average velocity would depend on the total distance traveled and the time taken to complete the semicircles.
Usually it is two semi-circles with straight stretches "inserted" between them. If the semicircles have radius r units, and the length of the straight sections is s units then Area = pi*r2 + 2r*s square units.
school
Polygon
2, because semi means half.
divide it by three, tha area