Question

Classify quadrilaterals and write their properties. Also write
the formulas of different plane figures and solid figures.
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Answer 1

Quadrilaterals and their Properties ⤵️

➡️ Parallelogram :-

• Opposite sides are parallel.

• Opposites sides are equal.

• Opposite angles are equal.

➡️ Square :-

• All sides are equal.

• All angles are equal and measure 90°.

➡️ Rectangle :-

• Opposite sides are parallel.

• Opposites sides are equal.

• All angles are equal and measure 90°.

➡️ Rhombus :-

• All sides are equal.

• Opposite angles are equal.

➡️ Trapezium :-

• Opposite sides are parallel.

• Adjacent angles add up to 180°.

Formulae for plane figures :-

Triangle :-

↪️Perimeter: 1st Side + 2nd Side + 3rd Side

↪️Area: 1/2 × base × height

Square :-

↪️Perimeter: 4 × side

↪️Area: side²

Rectangle :-

↪️Perimeter: 2×(l + b)

↪️ Area: length × breadth

Circle :-

↪️Perimeter: 2πr ( r= radius )

↪️Area: πr²