Write down the number of planes of symmetry for the $3D$ shape given below. 

$2 \mathrm{cm}$ by $3 \mathrm{cm}$em by $1 \mathrm{cm}$ cuboid

Write down the number of planes of symmetry for a prism with a regular pentagon as a cross-section.

Write down the number of planes of symmetry for prism with semi-circular cross-section

Write down the number of planes of symmetry for prism with trapezium cross-section

Sketch diagrams showing the positions of all the planes of symmetry of a prism with an isosceles triangle as a cross-section

Sketch diagrams showing the positions of all the planes of symmetry of a cuboid with a square base

Sketch diagrams showing the positions of all the planes of symmetry of a regular octahedron

Sketch diagrams showing the positions of all the planes of symmetry of a T-shaped prism