Name the Shape circle pentagon square rectangle hexagon

Name the Shape circle pentagon square rectangle hexagon triangle octagon

Triangle Names A triangle has 3 sides and 3 angles c a 60° a b The angles and sides of this triangle are all different. It is a scalene triangle. a + b + c = 180° 60° Equilateral triangles have 3 equal sides and 3 equal angles. a Isosceles triangles have 2 equal sides and 2 equal angles.

Triangle Names c 90° This is a right-angled triangle. One angle is 90°. a b This is an acute-angled triangle. a, b and c are all acute angles less than 90° obtuse angle This is an obtuse-angled triangle. One angle is obtuse greater than 90°

Quadrilaterals A quadrilateral has 4 sides and 4 angles. It can be split into 2 triangles. The sum of the angles of any quadrilateral = 2 x 180° = 360°. p q r s p + q + r + s = 360°

Special Quadrilaterals These are trapezia Trapezium One pair of sides parallel

Special Quadrilaterals These are parallelograms a b Parallelogram Opposite sides parallel Opposite sides equal Opposite angles equal

Special Quadrilaterals These are rhombuses Rhombus Parallelogram with all sides equal Unequal diagonals Diagonals perpendicular

Special Quadrilaterals These are rectangles Rectangle Parallelogram with perpendicular sides Diagonals equal Diagonals not perpendicular

Special Quadrilaterals These are squares Square Rectangle with all sides equal Diagonals at right angles

Special Quadrilaterals These are kites Kite Two pairs of adjacent sides equal Unequal diagonals Diagonals at right angles

Pentagons A pentagon has 5 sides and 5 angles. A regular pentagon has 5 equal sides and 5 equal angles

Hexagons A hexagon has 6 sides and 6 angles. A regular hexagon has 6 equal sides and 6 equal angles

Octagons An octagon has 8 sides and 8 angles. A regular octagon has 8 equal sides and 8 equal angles

3 D Shapes cubes cylinders cuboids triangular prism hexagonal prism