Geometric Formulas

PERIMETER OF A

SQUARE

P= 4sP= 4(5)P= 20

S = 5

AREA OF ASQUARE

A=s 2

3 in.

3 in.

Area of a Square

A=S

A= 3 in. x 3 in.

A= 9 sq. in.

2

3 in.

3 in.

Perimeter of a Square

P=4s

P=4(3 in.)

P=12 in.

PERIMETER OF ARECTANGLE

P= 2l + 2w

AREA OF ARECTANGLE

A= lw

2 in.

3 in.

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

2 in.

3 in.

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

PERIMETER OF APARALLELOGRAM

P=2b+2s

b

s

AREA OF APARALLELOGRAM

A=bhb

h

Fra

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ni -

VV

Nor

th

9 in.

12 in.

Area of a Parallelogram

A=bh

A= 12 in.(6 in.)

A= 72 sq. in.

6 in.

Fra

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ni -

VV

Nor

th

Perimeter of a ParallelogramP=2b+2sP=2(12 in.) + 2(9in.)P= 24 in. + 18 in.P= 42 in.

9 in.

12 in.

6 in.

Fra

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ni -

VV

Nor

th

PERIMETER OF ATRIANGLE

P=s + s + s 1 2 3

Side 3

Side 1

Side 2

Fra

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ni -

VV

Nor

th

AREA OF ATRIANGLE

A=1/2bh

b

h

8cm

6cm

10cm

Area of a Triangle

A= 1/2bh

A=1/2(6cm x 8cm)

A= ½(48cm)

A= 24 sq. cm.

Perimeter of a TriangleP=s + s + s

P=8cm+10cm+6cm

P= 24 cm

8cm

6cm

10cm

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