Answer: Lateral Area=290.40
Surface Area=411.40
Step-by-step explanation: The Lateral area is the sum of all 4 triangular faces. The formula for area of a triangle is 1/2bh.
1/2bh
1/2x11x13.2
=72.6
Now we multiply this by 4:
72.6 times 4=290.40
290.40 is the lateral area, we then need to find the area of the base.
A= length times width.
A= 11x11
A=121
We add this to the Lateral Area.
121+290.40=411.40
Surface Area is 411.40