Question

How do I do this don’t understand it?

Answer 1

You have to use
$a ^{2} + b ^{2} = c ^{2}$
so take your 12in in height and use it as your
$a^{2}$
divide 10 in half to make your base so now your
$b^{2}$
is 5. now you have to add 12 and 5. this gives you 17. now square root it.
$\sqrt{17}$
your answer in now. 4.12. since you have 2 triangles in one whole triangle add 4.12 to 4.12 and you get 8.24. your pyramid has 4 triangles so
$4 \times 8.24$
is 32.98.

10×10 is 100 so add 32.98 to it.

your surface area is 132.98