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6 May, 20:53

the area of the base (B) of a triangular pyramid is 28 cm. The perimeter (p) is 20 cm, and the slant height (S) is 5 cm. Determine the pyramid's surface area. A) 96 cm2 B) 128 cm2 C) 225 cm2 D) 78 cm2

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  1. 6 May, 21:07
    0
    78 cm2

    SA = B +

    1

    2

    ph

    SA = 28 +

    1

    2

    (20) (5)

    SA = 78 cm2
  2. 6 May, 22:19
    0
    Answer: D. 78cm2

    Step-by-step explanation:

    SA=B+1/2ph

    SA=28+1/2 (20) (5)

    SA=78cm2
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