A community for students.
Here's the question you clicked on:
 0 viewing
terricherri
 3 years ago
Find the area of an equilateral triangle (regular 3gon) with the given measurement.
9inch perimeter
A = sq. in
Help me my answer needs to be in square root.
terricherri
 3 years ago
Find the area of an equilateral triangle (regular 3gon) with the given measurement. 9inch perimeter A = sq. in Help me my answer needs to be in square root.

This Question is Closed

terricherri
 3 years ago
Best ResponseYou've already chosen the best response.0i have 9/3sqrt4 but thats not right

id21
 3 years ago
Best ResponseYou've already chosen the best response.1P=9in a=9/3=3in High of triangle (all corners are 60 degrees):\[h=a \times \sin60^o=a \sqrt3 /2\] \[Area=a \times h/2=a^2\sqrt3/2=9\sqrt{3}/2}\]

id21
 3 years ago
Best ResponseYou've already chosen the best response.1\[Area=a \times h/2=a^2 \sqrt3/2=9\sqrt{3}/2\]

Harkirat
 3 years ago
Best ResponseYou've already chosen the best response.1in case of an equilateral triangle, perimeter = 3 * side so side = perimeter/3 so each side = 9 in/3 = 3 in root(3) Area of an equilateral triangle =  * s² where s = length of side 4 root(3) 9 root(3) so area =  * (3cm)² =  cm² 4 4

id21
 3 years ago
Best ResponseYou've already chosen the best response.1Oh, yes, I miss one divider 2. Answer is area is \[9\sqrt3/4\] in^2

id21
 3 years ago
Best ResponseYou've already chosen the best response.1\[Area=a \times h/2=a^2\sqrt3/4=9\sqrt{3}/4\]

terricherri
 3 years ago
Best ResponseYou've already chosen the best response.0Find the area of an equilateral triangle (regular 3gon) with the given measurement. 6inch apothem A = sq. in. for this one i havwe 144sqrt2

terricherri
 3 years ago
Best ResponseYou've already chosen the best response.0does anyone know that

id21
 3 years ago
Best ResponseYou've already chosen the best response.1Apothem is 1/3 rd from high, right? Then h=3*6=18 in

id21
 3 years ago
Best ResponseYou've already chosen the best response.1\[Area=a \times h /2=a=2h/\sqrt3=2h^2/(\sqrt3 \times 2)=324/\sqrt3=108\sqrt3\]
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.