Triangles

Triangular shapes are especially important because triangles contribute strength and stability to walls and towers. The gable roofs of houses are triangular, as are the sides of many ramps.

A polygon is a closed geometric figure with at least three line segments for its sides

Questions  (8)

A triangle is a polygon with three sides (and three vertices)

Questions  (6)

In an isosceles triangle, the angles opposite the sides of equal length are called base angles, the sides of equal length form the vertex angle, and the third side is called the base.

Questions  (5)

If you draw several triangles and carefully measure each angle with a protractor, you will find that the sum of the angle measures of each triangle is 180°

Questions  (6)