Question

help me and plz give answer aswell thank you

Answer 1

We can’t give answers, but I can give you formulas for each shape, and then you can combine them together to get the surface area

SA of a rectangle:
\(\sf{SA_r = 2 ( lw + wh + lh )}\)

SA of a triangle:
\(\sf{SA_t = 2 ( 0.5 (lh) ) + wx + wh + lw}\)

Now, with these, they both share a similar face, \(\sf{lw}\), so we can just remove these from both equations (and add lw to the end of \(\sf{SA_r}\) in order to add the bottom surface area back.

\(\sf{SA_r = 2 ( wh + lh ) + lw}\)

\(\sf{SA_t = 2 ( 0.5 (lh) ) + wx + wh}\)

Which we can then plug in our numbers.

\(\sf{SA_r = 2 ( (7 \times 6) + (7 \times 6) ) + (6 \times 6)}\)

\(\sf{SA_t = 2 ( 0.5 (6 \times 4) ) + (6 \times 7) + (6 \times 4)}\)

Then just add those two together.

\(\sf{SA_r + SA_t = TSA}\)
(Total Surface Area)