225 + 135 = 360 The sum of interior angles in a triangle is 180˚. In an equilateral triangle, all three angles are equal to 60˚. To find the missing angles in an equilateral triangle ...

e.g., a shape will be called a triangle if it looks like an equilateral triangle with a horizontal base – all others are considered ‘wrong’ 1. Ask "What is a triangle?". 2. Using Sketchpad, create a ...

You may hear students say words like ‘paralyzed’ triangle for isosceles and equilateral triangles after noticing the restrictive movements of these triangles upon dragging. Properties of symmetry: - ...

Two congruent angles are simply pairs of angles with equal measures. You can find congruent angles examples in hundreds of everyday objects.