1. Definition Project
Mallory Collier 5th hour
Geometry

2. Acute Angle
The measure of an angle with a measure between 0° and
90° or with less than 90° radians.
Pizza

3. Collinear Points
A set of points that lie in a straight line.
Easter Island

4. Circle
The set of all points in a plane that are
fixed distance from a point called the
center of the circle.
Baseball

5. Cone
A three dimensional shape with only one
vertex, having a circular base.
Ice cream
cone

6. Cyclinder
A shape with a parallel circle and each end
and joined by a curved surface.
Candles

7. Line
An undefined term in geometry, a line is a
straight path that has no thickness and
extends forever.
Street

8. Angle
A figure formed by two rays with a
common endpoint.
Street Intersectoins

9. Point
A precise location or place on a plane,
usually presented by a dot.
A map

10. Obtuse Angle
An angle having a measurement of more
than 90
A hand fan

11. Perpendicular lines
Two lines or line segments intersect and
form right angles.
Windows

12. Plane
When a set of points joined together form
a plane, the plan can extend without end in
all directions.
The twin
tower site

13. Prism
A solid object that has two identical ends
and all flat surfaces.
A tissue box

14. Pyramid
A shape where the base is a polygon and
the sides are triangles that join at the top.
The Egyptian
pyramids

15. Ray
A straight line with one end point, the line
extends infinitely.
Power lines

16. Parallel lines
Two lines on a plane that never meet, they
are always the same distance apart.
Train tracks

17. Parallelogram
A quadrilateral that has both sets of
opposite sides that are parallel.
Building architectures

18. Rectangle
A parallelogram that has four right angles.
A carpet

19. Right Angle
An angle that is equal to 90
A bird house

20. Sphere
A solid shape that resembles a ball, every
point on the surface of the shape is the
same distance from the center.
The Earth

21. Square
A four sided flat shape with equal 90
angles.
a handicapped
sign

22. Triangle
Three sided polygon.
The pool table
ball set up

23. Vertex
A point of intersection that where two or
more rays meet, often called a corner.
A spider
web

24. Line segment
A straight path that has a beginning and an
end.
A cross walk

25. Trapezoid
A quadrilateral with exactly two parallel
sides.
A popcorn holder