Quadrilaterals.pptxbkugylfyufulhkvgyulfufu
- 1. Quadrilateral 1) What is a Quadrilateral? A shape with 4 straight sides… 2) How many can you name? Square Equal sides 2 pairs of Parallel sides All angles 90˚ Rectangle 2 pairs of Equal sides 2pairs of Parallel sides All angles 90˚ Trapezium 1 pair of parallel sides Rhombus Equal sides Opposite sides parallel Opposite angles equal Parallelogram 2 pairs of equal sides Opposite sides parallel Opposite angles equal Arrowhead (Delta) Contains a reflex angle Adjacent sides are equal Kite 2 pairs of equal sides No parallel sides Irregular None of the other ones!
- 2. Lines of Symmetry Use a mirror to work out how many lines of symmetry each quadrilateral has 4 2 1 1 1 2 0 0 0 Square Rectangle Trapezium Rhombus Parallelogram Arrowhead (Delta) Kite Irregular
- 3. Rotational Symmetry 4 2 No rotational symmetry No rotational symmetry No rotational symmetry 2 2 No rotational symmetry How many times does the shape fit exactly on itself? Count as it spins No rotational symmetry
- 4. Square Bisect each other Cross at 90° Rectangle Bisect NOT at 90° Trapezium DO NOT Bisect NOT at 90° Rhombus Bisect Cross at 90° Parallelogram Bisect NOT at 90° Arrowhead (Delta) DO NOT Bisect Cross at 90° OUTSIDE the shape Kite DO NOT Bisect Cross at 90° Irregular DO NOT Bisect NOT at 90° Diagonals in Quadrilaterals Bisect: Divide into two equal parts