We know that
[lateral surface area of a regular triangular pyramid]=3*[area of one <span>equilateral triangle]
so
[area of one </span>equilateral triangle]=lateral surface/3-----> 81/3-----> 27 ft²
[<span>surface area of the regular triangular pyramid]=lateral area+area of the base
area of the base is equals to the area of the lateral sides because are </span>equilateral triangles
therefore
area of the base=27 ft²
[surface area of the regular triangular pyramid]=81+27----> 108 ft²
the answer is
<span>the surface area of the regular triangular pyramid is 108 ft</span>²
Answer:
-11
Step-by-step explanation:
-1-10=-11
If by difference, the question means subtraction, then the answer is -11. If they mean the distance between, then the answer is 9
Answer:
Look at attachment!
Step-by-step explanation:
E2020 Said so!
Adding a zero on the right changes the place value of all the other digits
Answer:
he gave him 4 books.
Step-by-step explanation:
10-6=4
