Maths
Meg2021-07-06T13:15:31+00:009Y/T Band: Unit: Angles in polygons
In this lesson, you will learn about the interior angles in a triangle, and how to find unknown angles in various types of triangles.
In this lesson, you will learn about the key terminology involved in describing polygons, and begin to categorise polygons, based on certain properties.
In this lesson, you will learn how to arrange triangles to form polygons (part I).
In this lesson, you will learn how to arrange triangles to form polygons (part II).
In this lesson, you will learn that the sum of the interior angles of a polygon can be found using triangles.
In this lesson, you will learn how to generalise the sum of the interior angles in an n-sided polygon.
In this lesson, you will learn how to apply the generalisation of the total interior angles in an n-sided polygon.
In this lesson, you will learn how to find an unknown angle in a polygon.
In this lesson, you will learn about exterior angles, and how they sum to 360 degrees.
In this lesson, you will learn how to calculate the mean interior and exterior angles of n-sided polygons, and solve problems based on these formulae.
In this lesson, you will combine everything learnt so far about angles in polygons to compare how specific examples relate to generalised cases.
In this lesson, you will learn about how to problem solve with angles in polygons, along with learning notations for referring to angles.
9P Band: Unit: Forming and solving equations
In this lesson we will look at the different values that expressions can take, and how changing a variable can change the value of the expressions.
In this lesson we will look at the difference between an equation and an identity.
In this lesson we will look at how we can form linear equations, and solve them.
In this lesson we will look at using different methods for forming and solving linear equations.
In this lesson we will form equations for perimeters and equate them.
In this lesson we will look at more difficult linear equations and solve them using algebraic methods.
In this lesson we will use our knowledge of geometry and angle facts to form and solve linear equations.
In this lesson we will form linear equations from worded descriptions, and then solve them.
9P Band: Unit: Angle Review
In this lesson, you will review that the internal angles in a triangle sum to 180 degrees.
In this lesson, you will review that the total interior angles of polygons are made up of many triangles.
In this lesson, you will review how straight line angles sum to 180 degrees, and how angles around a point sum to 360 degrees.
In this lesson, you will review the various angle facts that appear in parallel lines.
