Area

• Rectangle 1
• Rectangle 2
• Triangle 1
• Triangle 2
• Circle

Rectangle 1

$l$ = 1	length of rectangle
$w$ = 1	width of rectangle
$s$ = $l \cdot w$ = 1	area of rectangle

Rectangle 2

$l$ = 1	length of rectangle
$w$ = 1	width of rectangle
$s$ = $l \cdot w$ = 1	area of rectangle

Triangle 1

$l$ = 1	length of triangle
$w$ = 1	width of triangle
$s = l \cdot w \div 2 =$ 0.5	area of triangle

Triangle 2

$l$ = 1	length of triangle
$w$ = 1	width of triangle
$s = l \cdot w \div 2 =$ 0.5	area of triangle

Circle

$r$ = 1	radius of circle
$s = \pi \cdot r^2 =$ 3.142	area of circle

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