A quadrilateral with exactly one pair of parallel sides
Two rays that share an endpoint
A part of a line that has one endpoint and extends indefinitely in one direction.
An infinite set of points forming a straight path extending in two directions.
The point at which two line segments, lines or rays meet to form an angle.
A triangle that has no congruent sides.
A triangle that has at least two congruent sides
A triangle whose sides are all the same length
A parallelogram with all four sides equal in length
An angle that measures exactly 90 degrees.
A quadrilateral with two pairs of parallel and congruent sides.
An angle with a measure greater than 90 degrees.
An angle with a measure of less than 90 degrees
An instrument for measuring atmospheric pressure, usually to determine altitude or weather changes.
Any instrument for measuring the water-vapor content (humidity) of the atmosphere.
A wind gauge, an instrument for recording the speed and often the direction of winds
A measure of the amount of moisture in the air
Rain, snow, sleet, dew, etc, formed by condensation of water vapour in the atmosphere.
the lowest layer of the atmosphere, 6 miles (10 km) high in some areas and as much as 12 miles (20 km) high in others, within which there is a steady drop in temperature with increasing altitude and within which nearly all cloud formations occur and weather conditions manifest themselves.