205k views
0 votes
Find the surface area of regular prism with height 6 cm, if the base of the prism is: a Equilateral triangle with the side 3 cm and altitude of the triangle of approximately 2.6 cm.

User Andru
by
7.6k points

1 Answer

2 votes
we know that
[surface area]=2*[area of the base]+[perimeter of the base]*height of prism

area of the base= area of a equilateral triangle
b=3 cm
h=2.6 cm
area of the base=b*h/2-----> 3*2.6/2----> 3.9 cm²

perimeter of the base=perimeter of a equilateral triangle
b=3 cm
perimeter=3*(3)-----> 9 cm

[surface area]=2*[area of the base]+[perimeter of the base]*height of prism
[surface area]=2*[3.9]+[9]*6-----> 7.8+54-----> 61.8 cm²

the answer is
61.8 cm²
User Skb
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories