Geometry The Shapes Around Us
Line
Line Segment
Ray
Parallel Lines
Intersecting Lines
Perpendicular Lines
Circle
Chord
Diameter
Radius
Polygons straight lines closed
Triangle 3 sides
Quadrilateral 4 sides
Pentagon 5 sides
Hexagon 6 sides
Octagon 8 sides
Rectangle 4 sides opposite sides same length 4 right angles
Square 4 equal sides 4 right angles
Rhombus 4 equal sides 2 pairs of parallel sides
Trapezoid 1 pair of parallel sides
Cube
Cone
Pyramid
Sphere
Rectangular Prism
Cylinder
Triangular Prism
Right Angle Formed by perpendicular lines. Measures 90°
Obtuse Angle Has a measure greater than 180°
Acute Angle Has a measure less than 90°
Isosceles Triangle At least two sides or angles that are equal.
Equilateral Triangle Three sides and angles that are equal.
Scalene Triangle No sides or angles that are equal.
Obtuse Triangle Has one obtuse angle.
Acute Triangle Has three acute angles.
Right Triangle Has one right angle.
The End