Answer:
All squares have four equal angles
Step-by-step explanation:
Every square must have four equal angles to be a square
The area of one of the triangular lateral faces is

You're told that the slant height, which is the same as the height of the triangular face, is 9.8, so you have

where

is the length of the base of the triangle, which is also the same as the side length of the base of the pyramid. So
Answer:
412^10
Step-by-step explanation:
^^^^^^^^^^^^^^^^^
It’s 30 square units cus it’s area and area is Length * Widtj
Answer:
418
Step-by-step explanation: 457-17-13-9=418
To double check: 418 + 17 + 13 + 9 = 457