Answer:
The area would be 108 mm.
Step-by-step explanation:
First I found the area of the whole shape, then I subtracted the area of the unshaded part. from the shaded part.
1.Area of a triangle is 1/2bh
b=18 h=13
1/2*18*13=9*13=117 cm²
2. b=3+4=7 h=4
1/2(7*4)=1/2*28=14 cm²
