It’s 50 degrees cuz alternate exterior angles
Perimeter is where you add up all the sides, which is 5+5+4+6+7+9=36cm
You MULTIPLY this expression six times to arrive at this answer.
I am joyous to assist you anytime.
10) M^2 + M^2 = 9 root 2
You can use Triganometry to find th missing length or the sine rule. The sine rule is: a / SinA = b / SinB. Substitute the length 9 root 2 as a and substitute both Sin45 into SinA and SinB the calculator should simply give you the answer... hope this helps