The surface area of a triangular pyramid is 408 m2.
If all the faces of the pyramid are congruent, what is the area of one face of this pyramid?
A.
68 m2
B.
136 m2
C.
51 m2
D.
102 m2
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Directrix (directrix):
Did the instructions state whether the triangular pyramid has all 4 faces congruent or give any other info about the pyramid such as it is regular?
OpenStudy (x__hazel__x):
All it says is,
The surface area of a triangular pyramid is 408 m2.
If all the faces of the pyramid are congruent, what is the area of one face of this pyramid?
A.
68 m2
B.
136 m2
C.
51 m2
D.
102 m2
OpenStudy (x__hazel__x):
I have 10 minutes to get this answer XD
Directrix (directrix):
Sorry that I did not see this: If all the faces of the pyramid are congruent
OpenStudy (x__hazel__x):
okay!
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Directrix (directrix):
408 m2 is the total surface area of 4 triangles.
Each triangle has the same area.
OpenStudy (x__hazel__x):
what do we do now? :3
Directrix (directrix):
Hint: Divide.
OpenStudy (x__hazel__x):
Do I do 408 divided by 4?
OpenStudy (x__hazel__x):
So if I do \[408 \div 4 = 102 \]
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