Question

Find the area. Give your answer to 3 significant figures.

Answer 1

I'm not sure if you're asking for the whole shape or one of them but, for the whole shape you just.

7.1 x 5.8 = 41.18cm2 = 41.2cm2.

for the right angle, it's =

c2- b2 = a2
7.1cm2 - 6.5cm2 = a2
50.41 - 42.25 = a2.
a2= 7.89
=
square root = 7.89 = 2.808cm2 = 2.81cm2

then the other shape would be -
5.8 - 2.81= 2.99.
= 
5.8 x 2.99 = 17.342cm2
+
5.8 x 6.5 = 37.7cm2
=
55.042cm2
= 
55.0 cm 2