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What is required to Understand Triangle Geometry

Second only to the line, Triangle Geometry is the pure foundation of Geometry. Why? Take any polygon shape, and start joining the vertices with lines and you will create triangles. Triangles are the simplest of the polygon shapes, but dictate so much of geometry, both two and three dimensional!

So what does your student need to know about the triangle?

How to calculate the Area and Perimeter

How to identify by lines and angles.

How to Calculate the Area and Perimiter

The formulas for calculating the area and perimeter of triangles must be learned and understood. A student must know what they are doing as well as how to do it. This will prove more and more important as their studies move into the realm of polygons and n-gons.

$triangle geometry, triangle area formula$ If your child has difficulty in understanding the concept of the triangles area, consider cutting two copies of the same triangle from card. Place them together. For a right angled triangle they will create a rectangle, for any other triangle, they will create a rhombus – whose area is the same a rectangle! They used two triangles, so the area of one, is half that of the rhombus.

Allow your child the time to fully explore triangles and their formula before progressing to polygons. The time spent here will be worth it!

How to Identify Triangles by Lines and Angles.

Knowing how to identify triangles by lines and angles is a must for any K6 Student. Sometimes questions in the Triangle Geometry are as basic as ‘identify what type of triangle this is.’ Knowing the vocabulary is a must.

There are three types of triangles, and two methods of identifying each of them. These methods can also be combined. For example a triangle can be a right Isosceles.

By their Line Measurements - equilateral, Isosceles & Scalene.

By their Angle Measurements - Right, Obtuse & Acute.

So, there are six triangly types to be remembered!

A Simple Mnemonic to assist with these names is this:

ROSE Is Amazing!

R - Right

O - Obtuse

S - Scalene

E - Equilateral

I - Isosceles

A - Acute

Does your child have a protractor to measure angles? When studying Triangle Geometry this is an essential tool.

By visiting our Home Page you can explore our other K6 Math areas.

Print off your Free Printable Math Worksheets to offer your child any practice they may require.

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