Angles and Quadrilaterals
By: Madi F. and Zoey
Acute Angle - An Acute Angle is less than 90 Degrees. They are the smallest angle between 1-90 degrees.
Obtuse Angel - It is about the opposite of acute angle. It is bigger than a right angle and acute angle. Its more than 90 and less than 180 degrees.
Straight Angle - A straight angle is a straight line. It's 180 degrees, and is half of a full 360 degree circle.
Right Angle - You rarely see the 90 degrees on the picture. If it has a square in the corner it's 90 degrees. It's what most of the angles are based on.
Quadrilateral means four sides. Any shape that has four sides is a quadrilateral.
A square is a four-sided shape that has all same sides. Each angle has 90 degrees. A square is always a rectangle but a rectangle is not always a square.
A rectangle has four sides. A rectangle is a quadrilateral. It is a type of parallelogram.
A Rhombus is a four sided shape. It is often called a diamond. It's also a parallelogram.
A trapezoid is a 4-sided shape. A trapezoid also has 4 straight sides. A trapezoid is called a trapezium in the UK.
A parallelogram has four straight sides. The opposite sides are parallel.
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