Show:
Building Blocks of Geometry
Angles
Circles
Space Geometry
Geometry in Nature and in Art
100
The most basic building block of geometry. It has no size. It has only location.
What is a point?
100
Formed by two rays that share a common endpoint.
What is an angle?
100
A line segment whose endpoints lie on the circle.
What is a chord?
100
The set of all points.
What is space?
100

It looks the same after you turn it around a point by less than a full circle.

What is rotational symmetry?

200
Straight, continuous arrangement of infinity many points.
What is a line?
200
The common endpoint of two rays.
What is a vertex?
200
A chord that passes through the center; it is also the longest chord.
What is a diameter?
200
Two-dimensional drawings.
What is an isometric drawing?
200

Folded along a line so that all the points on one side of the line exactly coincide with all the points on the other side of the line.

What is reflectional symmetry?

300
A flat surface that extends infinitely along its length and width.
What is a plane?
300
The measure of an angle is the smallest amount of rotation about the vertex from one ray to the other, measure in
What is degrees?
300
A line tha tintersects that circle only once.
What is a tangent?
300
A solid consisting of two congruent, parallel circles and their interiors.
What is a cylinder?
300

You can make many designs using the basic tools of geometry.

What is a compass and straightedge (ruler or protractor)?

400
On the same plane.
What is coplanar?
400

2 angles that share a side

What are adjacent angles?

400
Two or more circles that have the same radius.
What are congruent circles?
400
A polyhedron with two congruent, parallel bases connected by lateral faces that are parallelograms.
What is a prism?
400

Three things in nature that have geometric shapes of a hexagon and pentagon.

What is a hexagon: honeycomb, snowflake or pentagon: starfish, flower?

500
Consists of two points called the endpoints of the segment and all points between them that are collinear with the two points.
What is a line segment?
500

Adjacent angles whose none linear sides are opposite rays.

What is a linear pair?

500
Two or more coplanar circles that share the same center.
What are concentric circles?
500
Half of a sphere and its great circle base.
What is a hemisphere?
500
This culture uses geometry in their art.
Who is Islamic, Hindu, or Celtic?