A student found the surface area of this pyramid.
Surface area = (12)6) + 2(12)(8) +2 (6)(9.5)
= 72 +48 + 28.5
= 148.5cm
What error did the student make?
The student should have used the same value for
all of the triangular faces.
The student added only three of the five faces.
O The student did not use the correct formula to find
the area of the triangular faces.
The student did not find the correct area of the
rectangular base.
,8 cm
6 cm
9.5 cm
x
12 cm