# (MK) – Shapes

## Shapes

Shapes are the large portion of the mathematics branch of Geometry. Geometry covers mathematics problems regarding measurement, volume and areas of shapes. There are many, many shapes that are covered in geometry, we are going to look into the main shapes and how information is calculated when examining them.

### Vocabulary

Note: Please, forgive me for the length, but necessary..

• Acute angle – angle that measures less than 90 degrees
• Angle - the meeting point of two lines
• Area - space inside of a shape or the space taken up by an object
• Circle - a round shape with edges equal distance from a central point
• Decagon - ten sided polygon
• Degree - unit of measurement for angles
• Diameter - measurement across a circle from one edge to another, bisecting the center
• Equilateral triangle – triangle with equal sides
• Heptagon - seven sided polygon
• Hexagon - six sided polygon
• Isosceles triangle – triangle with two equal sides
• Kite - a polygon with two distinctive pairs of parallel sides; measurements can differ
• Obtuse angle – angle that measures greater than 90 degrees
• Octagon - eight sided polygon
• Pentagon - five sided polygon
• PI - the ratio between the diameter and radius of a circle ( 3.14159265359 )
• Polygon – the connection formed by at least 3 lines meeting together to create angles
• Quadrilateral- a four sided polygon
• Radius - measurement of distance from center of a circle to outer edge
• Rectangle – four sided polygon with all right angles
• Right Angle – an angle that measures 90 degrees
• Square - four sided quadrilateral polygon with equal sides
• Triangle - three sided polygon
• Trapezoid - quadrilateral polygon with at least 2 sides that are parallel to each other
• Volume - space inside a 3D object or space taken up by a 3D object

### Types of Shapes

• #### Scalene Triangle - no equal sides or angles

 EQUILATERAL ISOSCELES SCALENE

SQUARE

PENTAGON

HEXAGON

HEPTAGON

• #### Eight equal sides

OCTOGON

If you have any questions please comment and good luck on your studying for the ASVAB exam!