Example by Mrs. Lancaster My Digital Dictionary of Geometric Shapes Example by Mrs. Lancaster

Our Project In groups of 3 to 4 students you must make a PowerPoint digital dictionary of geometric shapes. Each PowerPoint must have 10 slides total The first page must include a title and the name of everyone in your group. The next 9 pages will be of angles and polygons and/or 3D shapes of your choosing. There must be a picture and a definition on each slide. The pictures for the project will be taken by your group using a digital camera and downloaded by Mrs. Lancaster into your PowerPoint.

What is a Polygon? Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up). Examples: http://www.mathsisfun.com/geometry/polygons.html

Obtuse Triangle An obtuse triangle has exactly one obtuse angle

Right Triangle A right triangle has exactly one right angle

Equilateral Triangle Equilateral triangles have all sides and angles the same

Isosceles Triangle Isosceles triangles have exactly two sides that are the same (congruent)

Quadrilateral Quadrilaterals are polygons with exactly 4 sides Examples include:

Pentagon Pentagons are polygons with exactly 5 sides

Hexagon A hexagon is a polygon with exactly 6 sides

Heptagon A heptagon is a polygon with exactly 7 sides

Octagon An octagon is a polygon with exactly 8 sides

Pyramid A solid figure with a polygonal base and triangular faces that meet at a common point

Prism A solid figure whose bases or ends have the same size and shape and are parallel to one another, and each of whose sides is a parallelogram.

Right Angle Angle that measures exactly 90 degrees

Acute Angle An angle that measures between 89 degrees and 1 degree

Obtuse Angle An obtuse angle measures between 91 degrees and 179 degrees