Answer:
180mm^2
Step-by-step explanation:
CB = 15^2 + 6^2 = 261, the square root of 261 is ~16mm
CB is 16mm
the area of the triangle is A=ab/2
A=45mm^2
Now you need to find the area of the rectangle
A=l×w
A= 15×9= 135mm^2
now add both areas
(135+45)mm^2=180mm^2
