Drexel dragonThe Math ForumDonate to the Math Forum

Ask Dr. Math

Middle School Archive


This page:
  triangles/polygons checkmark

  Dr. Math

See also the
Dr. Math FAQ:
  geometric formulas
  naming polygons
  and polyhedra

  Pythagorean theorem

Internet Library:


About Math

   factoring expressions
   graphing equations

   factoring numbers


     conic sections/
   3D and higher



Number Sense
   factoring numbers
   negative numbers
   prime numbers
   square roots

Word Problems

Browse Middle School Triangles and Other Polygons
Stars indicate particularly interesting answers or good places to begin browsing.

Selected answers to common questions:
    Classifying quadrilaterals.
    Polygon diagonals.
    Pythagorean theorem proofs.

Base or Width? [06/11/2002]




Characteristics of an Orthocenter [11/12/1999]
What are some characteristics of the orthocenter of a triangle?

Circles and Squares [4/3/1996]
Given a large circle with a square inside it (the sides of the square are equal to the radius of the larger circle and are chords of the circle) and a smaller circle inside the square...

Classifying Triangles [06/04/2002]

Cleaning the Ice [09/09/1997]

Concave and Convex Polygons [08/13/2001]
What's the difference between a convex and a concave polygon?

Congruent Triangles - SSS Test [11/16/1998]
How do you know if two triangles are congruent?

Constructing a Segment [09/26/1999]

Constructing the Orthocenter [01/27/1999]
How do you construct the orthocenter of a triangle?

Constructing Triangles [3/6/1996]
How do you construct 30-60-90 triangles with a compass and a straight edge?

How many square inches are in ten square feet?

Convex and Concave Polygons [3/23/1996]
What are convex and concave polygons?

Convex Polygons [2/5/1996]
Students from Sweet Home Middle school ask many questions about convex polygons.

Convex Polygons and Other Questions [1/22/1996]
A 7th grade geometry class asks some questions about area and perimeter.


Counting Sides by Counting Diagonals [06/04/2002]

Covering Paper using Index Cards [10/24/2001]


Decagons [05/04/1997]
What does a decagon look like?

Defining the Term Oblong [05/15/2000]
Can you give a definition of the term "oblong"?

Definition of Opposite Sides [01/18/2001]

De Longchamp's Point [09/21/2000]
What is De Longchamp's point, and how is it used?

Determining Triangle Similarity [05/26/1998]

Diagonals and Axes of Symmetry [03/31/1998]
Could you explain the concepts behind the diagonals and axes of symmetry in a regular octagon?

Diagonals and Tiles [11/17/2001]


Dimensions of a Rectangle [8/26/1996]

Dissecting a Square into Acute Triangles [11/09/1999]
Can you dissect a square into a finite number (fewer than 14) of acute triangles?

Distance Between Opposite Corners of a Box [05/09/2002]
A moth is sitting in the lower left front corner of a storage shed. What is the length of the shortest path that the moth can fly to the upper right back corner of the shed?

Distance Between Points of Tangency [03/20/1999]
What is the distance between the contact points of two smaller circles in contact with a larger circle...?

Distance between Two Points [08/03/1999]
I'm trying to find an equation to measure the distance between 2 points on a 3D plane.

Distance to an Object [04/07/2000]
Is there an easy way to measure the distance from a baseline to an object if one knows the measurement of the baseline and both angles leading toward the object?

Dividing a 30-60-90 Triangle in Four [08/07/1999]
Find four different ways to divide a 30-60-90 triangle into four triangles similar to and each having 1/4 the area of the original triangle.


Dividing a Hexagon into 8 Equal Parts [06/11/1999]
How can you divide a regular hexagon into 8 equal parts?

Dividing a Square [07/31/1999]

Dividing a Square Cake into Five Equal Pieces [07/28/2001]
How can you divide a square-topped cake that is a rectangular solid and is frosted on all faces into five pieces so that everyone receives the same amount of cake and icing?


Search the Dr. Math Library:

Search: entire archive just Middle School Triangles and Other Polygons

Find items containing (put spaces between keywords):
Click only once for faster results:


parts of words whole words

[Privacy Policy] [Terms of Use]


© 1994-2015 Drexel University. All rights reserved.