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1 An isosceles triangle has one line of symmetry.

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Presentation on theme: "1 An isosceles triangle has one line of symmetry."— Presentation transcript:

1 1 An isosceles triangle has one line of symmetry

2 2 An isosceles triangle has no rotational symmetry

3 3 A triangle can have either one, two or three lines of symmetry

4 4 An triangle can have no lines of symmetry

5 5 An triangle can have rotational symmetry of order 2

6 6 An right-angled triangle has one line of symmetry

7 7 The hypotenuse is always opposite the right angle

8 8 The sloping side is the hypotenuse

9 9 Right-angled triangles have two equal sides

10 10 Double the lengths of the triangle’s sides = double the size of the angles

11 11 The area of a triangle can be found using the formula.

12 12 The area of a triangle is always greater than its perimeter

13 13 2 6 4

14 14 2 6 4

15 15 a c b

16 16 x 17 10

17 17 x 10

18 18 ALWAYS

19 19 SOMETIMES

20 20 NEVE R

21 21


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