Answer:x=-3,y=3
or (-3,3)
Step-by-step explanation:
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
?=118°
Answer:
<6+62=180 co interior angle
<6=180-62=118°
Answer:
A. 
(first option)
Step-by-step explanation:
➡️ 
➡️ 
➡️ 
➡️ 
➡️ 
Answer:
No. The amounts of change are the same, but the original amounts are different.
