Answer:
300mm²
Step-by-step explanation:
First we need to break up the shape into separate shapes to make it easier to work out.
Top : [tex]\frac{1}{2}[/tex]×base×height
\frac{1}{2} x 15 x 30 = 225
Bottom : same formula
\frac{1}{2} x 15 x 10=75
Add them all together
225+75=300mm^2
