Answer: 
 
151.5 cm^2 
 
Step-by-step explanation: 
 
lets cut stright acrros so you have a triangle 13 (base) by 3 cm (high) 
 
area of a triangle is 1/2 base times hight --> 13x3/2 = 19.5cm^2 
 
now lets doi the rectangle that is 12 by 11 
 
Length times hight is the area is 132 
 
add both areas 132 + 19.5