What is the lateral surface area of the triangular pyramid shown? Round to the nearest tenth.
A triangular pyramid. The base has a base of 12 and height of 12. A side has a base of 12 and height of 7.8. The other 2 sides have a base of 10 and height of 8.
[Not drawn to scale]
126.8
173.6
206.8
253.6