Dividing a Trapezoid
Divide a given shape into 4 congruent shapes.
Author Archive for: corrill
Entries by InterMath
N-Sided Circle?
Compare the perimeters of polygons to the circumference of the circle.
Round Robin Tournament
Use the sides and diagonals in a regular polygon to create a round robin tournament.
Diagonals in a Polygon
Consider the number of diagonals in a triangle, quadrilateral, pentagon, hexagon, heptagon, and octagon.
Symmetry Lines II
Find polygons that have line symmetry. Many polygons do not have line symmetry.
Symmetry Lines
Determine the number of symmetry lines a polygon has.
Magic Triangle
Place the digits 1 through 9 in the circles in a very special way.
Counting Triangles
Determine the number of triangles in the diagram.
Non-Overlapping Triangles
Use three lines to form as many triangles as possible.
Lining Up to Find Triangles
Draw lines to find the largest amount of triangles.