Symmetry
reflecting a point in a line or in a point, axes of symmetry of figures, recognising symmetric points, perpendicular bisectors and angle bisectors, figures with point symmetry
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Which of these figures does not have a centre of symmetry?
a disc, a regular hexagon, a line segment, a trapezium with bases of different lengths
How many axes of symmetry does this figure have?
A kite
Are these points symmetric about the drawn axis?
points A and B
Give the coordinates of the centre of symmetry of parallelogram ABCD.
centre of symmetry of parallelogram ABCD = ?
Problem
Vertex C of rhombus ABCD lies on the perpendicular bisectors of sides AB and AD. What is the measure of angle BCD of this rhombus?
Read the drawing and give the coordinates of the image of the point
image of P under the reflection in the x-axis = ?
Which line is the perpendicular bisector of segment AB?
segment AB and lines a, b, c, d
Problem
The bisector of angle BAC of triangle ABC meets side BC at point D. Angle BAC measures 76° and angle ABC measures 20°. What is the measure of angle ADC?
Complete the figure so that it is symmetric about the drawn axis, and give the coordinates of the image of vertex B.
image of vertex B under the reflection in the drawn axis = ?
Which of these figures does not have a centre of symmetry?
a regular hexagon, a rectangle, an isosceles triangle, a disc
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