So the rule that we have to apply here is (x, y) -> (x, -y).īased on the rule given in step 1, we have to find the vertices of the reflected triangle A'B'C'. Pupils will be able to: complete an investigation on reflections, translations and. c) Label the reflected vertices P, Q, R, S and T. to recognise and visualise reflection and line symmetry. Here triangle is reflected about x - axis. 3 Which diagrams show a correct reflection in the given mirror line.
#Reflection math how to
How to perform and describe reflections on a grid using straight line graphs as the mirror line. If this triangle is reflected about x-axis, what will be the new vertices A', B' and C'?įirst we have to know the correct rule that we have to apply in this problem. Reflections on a grid GCSE maths lesson and worksheet.
Let A ( -2, 1), B (2, 4) and (4, 2) be the three vertices of a triangle. When an object is place before the mirror, the image is formed. Mathematics classrooms should be places where.
Let us consider the following example to have better understanding of reflection. We know, reflection is a known word and is related to the subject of physics and mathematics. Jo Boaler, Professor of Mathematics Education, Stanford University. Here the rule we have applied is (x, y) -> (x, -y).
Once students understand the rules which they have to apply for reflection transformation, they can easily make reflection -transformation of a figure.įor example, if we are going to make reflection transformation of the point (2,3) about x-axis, after transformation, the point would be (2,-3).
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