Question

1. find the perimeter of the figure below:

63 mm
76 mm
56 mm
84 mm

Explanation:

Step1: Find the missing horizontal side

The missing horizontal side length is $84 - 63=21$ mm.

Step2: Find the missing vertical side

The missing vertical side length is $76 - 56 = 20$ mm.

Step3: Calculate the perimeter

The perimeter is the sum of all side - lengths.
$P=76 + 63+20 + 21+56+84$
$P=(76 + 63)+(20 + 21)+(56 + 84)$
$P = 139+41+140$
$P=320$ mm

Answer:

$320$ mm