In this topic, students will:
classify triangles by their sides and angles
classify quadrilaterals by their properties
classify quadrilaterals using a hierarchy
Vocabulary:
Equilateral triangle - all sides are the same length.
Isosceles triangle - has at least two sides of the same length.
Scalene Triangle - no sides are the same length.
Right Triangle - has one right angle.
Acute Triangle - has three acute angles.
Obtuse Triangle - has one obtuse angle.
Parallelogram - a quadrilateral with both pairs of opposite sides parallel and equal in length.
Trapezoid - a quadrilateral that has one pair of parallel sides.
Square - a rectangle with all the sides the same length.
Rectangle - a parallelogram with four right angles.
Rhombus - a parallelogram with all sides the same length.
Venn Diagram - a drawing that shows how sets of numbers or objects are related.