VOCABULARY GEOMETRY

Line: is straight (no curves), has no thickness, and extends in both directions without end (infinitely)
Line segment: The part of a line that connects two points. It has definite end points.
Ray: A line with a start point but no end point (it goes to infinity)
Acute angle: an angle that is less than 90°
Right angle: an angle that is 90° exactly
Obtuse angle: an angle that is greater than 90° but less than 180°
Straight angle: an angle that is 180° exactly
Quadrilaterals: Rhombus, Square, Rectangle, Kite, Parallelogram, Trapezoid
Isosceles triangle: Two equal sides Two equal angles
Scalene triangle: No equal sides No equal angles
Equilateral triangle: Three equal sides Three equal angles, always 60°
Cartesian Plane: A Cartesian Plane is a plane consisting of a set of two lines intersecting each other at right angles. The horizontal line is the X-axis and the vertical one is the Y-axis, and the point of their intersection is called the origin with the coordinates (0, 0).
X-axis: runs horizontally through zero
Y-axis: runs vertically trough zero
Coordinates: Coordinates are a set of values that show an exact position.
2D Shapes: triangle, square, rectangle, pentagon, hexagon, heptagon(septagon), octagon, nonagon, decagon.
3D shapes: cone, sphere, hemisphere(semi sphere), triangular pyramid, triangular prism, cube, rectangular prism (cuboid), cylinder.
Face: A vertex (plural: vertices) is a point where two or more lines meet. It is a Corner.
Side-Edge: An edge is a line segment that join two vertices .
Corner-Vertex: A face is any of the individual surfaces of a solid object.