+208 Hey there!
Here, the Surface Area (SA) will be equal to the base + the three faces. We know the formula for the area of a triangle (\(\frac{Base*Height}{2}\)), so we get:
\(SA=6.9 + 3(\frac{4*7}{2})=...cm^2\)
Putting this into your calculator will give you your answer.
Let me know how you go :)
