Answer:
30.2
Explanation:
we use pythagorus theorem to find the missing length
a^2+b^2=c^
we substitute the lengths into a and b and we don't have c which is the missing length also called the hypotenuse
6^2+7^2=c^2
we work out 6^2 and 7^2 which is 36 and 49
this means that:
36+49=c^2
c^2= 85 because 36+49=85
so know we square root 85 because 85 is c squared (c^2) but we just want c (C is the missing length)
85 Square root = 9.22
now we add up all the lengths so
4+7+4+6+9.22=30.22
so the perimeter of the shape is 30.2 (rounded to 1 dp)