Geometric Formulas

PERIMETER OF A

SQUARE

P= 4s

AREA OF ASQUARE

A=s2

3 in.

3 in.

Area of a Square

A=s

A= 3 in.x3 in.

A=9 sq. in.

Perimeter of a Square

P=4s

P=4(3 in.)

P=12 in.

2

PERIMETER OF ARECTANGLE

P=2l+2w

AREA OF ARECTANGLE

A=lw

2 in.

3 in.

Perimeter of a RectangleP=2l+2wP=2(3 in.) + 2 (2in.)P=6 in. + 4 in.P=10 in.

Area of a RectangleA=lwA=3 in.(2 in.)A=6sq. in.

PERIMETER OF APARALLELOGRAM

P=2b+2s

AREA OF APARALLELOGRAM

A=bh

Perimeter of a ParallelogramP=2b+2sP=2(2 in.) + 2(3in.)P= 4 in. + 6 in.P= 10 in.

2 in.

3 in.

Area of a Parallelogram

A=bh

A= 2 in.(3 in.)

A= 6 sq. in.

PERIMETER OF ATRIANGLE

P=s +s +s1 2 3

AREA OF ATRIANGLE

A=1/2bh

Perimeter of a TriangleP=s + s + s

1 2 3

P=4cm+4cm+4cm

P= 12 cm

4cm

4cm

4cm

Area of a Triangle

A= 1/2bh

A=1/2(4cm x 4cm)

A= ½(16cm)

A= 8 sq. cm.