Geometry

Lesson

Lets remind ourselves about the properties of some special triangles.

In an equilateral triangle:

- All sides are equal lengths
- All angles are degrees(60)

Isosceles triangles have:

- Equal base angles

We can use these special properties to help us solve triangle problems.

Find the value of $x$`x`.

Find the value of $x$`x`.

Consider the given diagram.

a) Find the value of $a$`a`, giving reasons.

b) Find the value of $b$`b`, giving reasons.

Deduce the angle properties of intersecting and parallel lines and the angle properties of polygons and apply these properties