Geometry – Grade 5 2-D Shapes

Vocabulary You Need to Know! Point An exact, specific position Line Extends to infinity in both directions from a specific point Line Segment A line that begins at one specific point and ends at another specific point

Vocabulary You Need to Know! Angle The figure formed when two lines intersect at a point Acute Angle An angle whose measure is less than 90 degrees Obtuse Angle An angle whose measure is more than 90 degrees

Plane Figure Polygon Triangle Vocabulary You Need to Know! A flat, 2-D figure – it has no depth. The point where 2 sides intersect is call the vertex (vertices) Polygon A closed figure made of line segments Triangle A three sided polygon

Equilateral Isoscolese Scalene Right Triangles! A triangle with three equal sides Isoscolese A triangle with two equal sides Scalene A triangle with three different side lengths Right A triangle with a right angle

A quadrilateral whose sides and angles are different A polygon with 4 sides Regular A quadrilateral whose sides are the same length and the angles are the same Irregular A quadrilateral whose sides and angles are different

Quadrilaterals! Trapezoid Parallelogram Rhombus A quadrilateral with exactly one pair of parallel sides Parallelogram A quadrilateral with two pair of parallel sides Rhombus A quadrilateral with 4 equal sides

A quadrilateral with 2 sets of parallel sides and 4 equal angles Quadrilaterals! Rectangle A quadrilateral with 2 sets of parallel sides and 4 equal angles Square A quadrilateral with 2 sets of parallel sides of equal length and 4 equal angles