The triangle shown above are similar triangles. can you explain why?
To Construct an Equilateral Triangle.
Follow the instructions below to construct an Equilateral Triangle. If you get confused, pause and watch the video below.
To Construct an Isosceles Triangle.
How to construct a triangle given two angle measures and one side length.
(1.) Use the protractor in the applet below to draw a triangle where one angle measures 20° and another angle measures 45°.
(2.) Use the protractor in the applet below to draw a triangle where one angle measures 120° and another angle measures 50°.
Use the protractor in the applet below to draw a triangle where one angle measures 90° and another angle measures 100°.
Which of the above three triangles is impossible to draw?
In the diagram below, 9 toothpicks are used to make three equilateral triangles. Figure out a way to move only 3 of the toothpicks so that the diagram has exactly 5 equilateral triangles.