Question

calculate the perimeter of each shape​

Answer 1

Solution:-

Formula:-

perimeter = sum of all the sides.

f)  perimeter = (7+11+8+5+3)cm

                =  34 cm

g) It is a right angle triangle.

So, we can apply Pythagoras theorem to find the 3rd side.

$3rd\: side = \sqrt{8^{2}+6^{2} } =\sqrt{64+36} =\sqrt{100} = 10\: cm$

∴Perimeter = (10+8+6) cm= 24 cm

h)  It is also a right angle triangle.

So, we can apply Pythagoras theorem to find the 3rd side.

$3rd \:side = \sqrt{(37)^{2}-(12)^{2} } =\sqrt{1369-144} =\sqrt{1225} = 35\: cm$

∴Perimeter = (35+12+37) cm= 84 cm.

i) perimeter = (20+8+5+15+5+8+20+8+5+15+5+8) cm

                  =122 cm

This can help you.