Question

The perimeter of an irregular shape with 4

Answer 1

Answer:

9

Step-by-step explanation:

Three sides are

• 4cm
• 2cm
• 6cm

Let other side be x

$\rm \mapsto \: x + 4 + 2 + 6 = 21 \\ \rm \mapsto \: x + 6 + 6 = 21 \\ \rm \mapsto \: x + 12 = 21 \\ \rm \mapsto \: x = 21 - 12 \\ \rm \mapsto \: x = 9$