How many triangles are formed?
Place the digits 1 through 9 in the circles in a very special way.
Determine the number of triangles in the diagram.
Use three lines to form as many triangles as possible.
Draw lines to find the largest amount of triangles.
Readjust a diagram to form a number of triangles.
Count the number of triangles in a picture.
Explore Symmetry with Altitudes and Medians.
Explore the sequence of triangular numbers.
Explore properties of triangles constructed using the midpoint of given triangles.
Explain how to construct isosceles triangles.
Tile a square patio with triangular tiles.
Cut any given triangle into triangles of equal area.
Find the smallest possible perimeter of a scalene triangle.
Use the area of a triangle to transform a trapezoid into different quadrilaterals.
Investigate the areas of triangles in a variety of ways.
Use the concept of area to demonstrate the Pythagorean Theorem.
Help a farmer plant four trees.
Explore triangles inscribed in semicircles.
Locate the center of mass of a triangle.
Determine the necessary conditions to create a triangle.
Identify the sum of the exterior angles in a triangle.
Compare exterior angles with remote interior angles.
Find the best path from the inside of a triangle to its sides.
Explore the sum of interior angles of a triangle.
Investigate combining triangle classifications based on length and angle measure.
Determine the location of the altitudes in a triangle.