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All about Shapes. Properties of Shapes. Number of sides Number of angles Number of lines of symmetry Regular or irregular Right Angles Parallel lines. Shapes. Triangles. Quadrilaterals. Polygons. Regular Shapes. Key Words. Quadrilaterals. Shapes with 4 sides!. What shape is this?.
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Properties of Shapes • Number of sides • Number of angles • Number of lines of symmetry • Regular or irregular • Right Angles • Parallel lines
Shapes Triangles Quadrilaterals Polygons Regular Shapes Key Words
Quadrilaterals Shapes with 4 sides!
Properties of a Square • Has 4 equal sides • Has 4 equal angles • Each angle is a right angle • Has 4 lines of symmetry • Is a regular shape
Properties of a Rectangle • Has 2 pairs of equal sides • Has 4 equal angles • Each angle is a right angle • Has 2 lines of symmetry • Is an irregular shape
Properties of a Parallelogram • Has 2 pairs of equal sides • Has 2 pairs of equal angles • Opposite sides are parallel • Has NO lines of symmetry • Is an irregular shape
Properties of a Rhombus • Has 4 equal sides • Has 2 pairs of equal angles • Opposite sides are parallel • Has 2 lines of symmetry • Is an irregular shape
1 Because these angles are equal. How many lines of symmetry does this trapezoid have ?
Properties of a Trapezoid • Has unequal sides • One pair of opposite sides are parallel • Usually has NO lines of symmetry • Is an irregular shape
Properties of a diamond • Has 2 pairs of equal sides • Has 1 pair of equal angles • Equal sides are adjacent • Has 1 line of symmetry • Is an irregular shape
Quadrilaterals Shapes with 4 sides!
Triangles Shapes with 3 sides!
How many lines of symmetry does an equilateral triangle have? 1 2 3
Properties of an Equilateral Triangle • Has 3 equal sides • Has 3 equal angles • Each angle is a 60o angle • Has 3 lines of symmetry • Is a regular shape
How many lines of symmetry does an Isosceles Triangle have? 1
Properties of an Isosceles Triangle • Has 2 equal sides • Has 2 equal angles • Has 1 line of symmetry • Is an irregular shape
How many lines of symmetry does a scalene triangle have? None!
Properties of an Scalene Triangle • Has NO equal sides • Has NO equal angles • Has NO lines of symmetry • Is an irregular shape
Properties of a right triangle It will be isosceles and have 1 line of symmetry when these 2 sides are equal. • Has 1 right angle • May be an isosceles triangle • May have 1 line of symmetry • Is an irregular shape
Triangles Shapes with 3 sides!
Key Words • Regular Shape • Parallel • Perpendicular • Vertex • Diagonal • Bisect
Regular Shape Shapes are regular when • All their sides are the same length • All their angles are the same size
Parallel Lines are parallel when they are always the same distance apart.