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Countdown to Exams - Day 61 - Congruence criteria for triangles

Countdown to Exams - Day 61 - Congruence criteria for triangles

On day 61, we focus our attention on the Congruence criteria for triangles. There will be questions that ask you to state why two triangles are identical. Here you will need to examine the side lengths and angles of the triangle and see which of the four categories they fit into. Side, Side, Side (SSS), Side, Angle, Side (SAS), Angle, Side, Angle (ASA), Right Angle, Hypotenuse, Side (RHS).

You may have to flip/rotate the triangles in your head (or use tracing paper) to see if they match up and identify which criterion to use.

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Countdown to Exams - Day 60 - Transformations

Countdown to Exams - Day 60 - Transformations

Today we look at the popular topic of Transformations. There are four types of transformations to be aware of 1) Reflections (flipping a shape) 2) Rotations (turning a shape) 3) Translations (sliding a shape) and 4) Enlargements (altering the lengths of a shape). With each type of transformation, there are certain statements that need to be mentioned in order to secure full marks. A good indicator of how many things you need to state can be seen by the number of marks on offer. 

A little tip: Ask for tracing paper with any transformation question so you can double check by tracing the shape and seeing if it matches up!

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Countdown to Exams - Day 59 - Similarity and Congruence

Countdown to Exams - Day 59 - Similarity and Congruence

In today's blog, we are taking a look at Similarity and Congruence. Starting with congruence, the key thing to remember is that congruent shapes are IDENTICAL all sides are the same length and all angles are the same. The shapes may have been altered slightly so you might have to rotate, flip them so that they match up.

With similar shapes, it is important to understand that all angles remain the same and it is the side lengths that have been altered (essentially, similar shapes are ENLARGEMENTS of each other). You will have to calculate the scale factor in order to find missing values between the shapes.

When confronted with area and volume problems of similar shapes you must square or cube the scale factor to get the correct answer.

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Countdown to Exams - Day 55 - Circle definitions

Countdown to Exams - Day 55 - Circle definitions

In this quick countdown, we take a look at all the definitions of the parts of the circle. These will become useful when dealing with circle theorems, area problems involving circles and the equation of a circle. Make sure you are confident in the terms and where they are situated on a circle.

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Countdown to Exams - Day 53 - Perimeter and Area

Countdown to Exams - Day 53 - Perimeter and Area

Today our focus is on Perimeter and Area. The Perimeter of a shape is the distance around a shape and will require you to add up all of the side lengths together. You may have to deal with numbers and algebraic terms so make sure you are confident in collecting like terms. You also need to be aware of the properties of shapes so you can fill in missing lengths because they are equal etc.

Area is the space inside a 2D-shape. It is normally calculated by multiplying two lengths together (a horizontal and a vertical length).

You must take care of the units you have been given in the question and convert them all to the same if required. You are not given any formula for an area so make sure memorise them all.

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Countdown to Exams - Day 39 - 3D - shapes

Countdown to Exams - Day 39 - 3D - shapes

We are taking a look at 3D - Shapes today and how they are classified. We will take a look at Prisms, Pyramids and Spheres. Being able to identify the 3D - Shape will help with more complex problems involving calculating the the volume of the shape as well as the surface area. We can also classify these shapes according to the number of faces, edges and vertices (corners) it has.

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Countdown to Exams - Day 38 - Polygons

Countdown to Exams - Day 38 - Polygons

Polygons is today's focus on Day 38 in our countdown to exams. You will need to be able to give the names of many sided shapes and use this information to calculate the angles inside these more complex shapes. You may also have to state whether the shape is concave or convex as well as regular and irregular.

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Countdown to Exams - Day 37 - Triangles

Countdown to Exams - Day 37 - Triangles

Today we are  taking a look at the properties of Triangles. You will have to be able to name all of the triangles according to properties that they have. The key properties you will have to look out for are Side lengths, and angles.

It is important that you can correctly identify the types of triangle you are working with as it will help with finding missing angles in more complex problems (circle theorems, bearing problems)

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Countdown to Exams - Day 36 - Quadrilaterals

Countdown to Exams - Day 36 - Quadrilaterals

Today we are moving to the Geometry section and taking a look at the properties of Quadrilaterals. You will have to be able to name all of the quadrilaterals according to properties that they have. The key properties you will have to look out for are Side lengths, Parallel sides, Angles, Diagonals.

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