A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
The first angle of a triangle is 4° larger than twice the second angle. The third
angle is 21° smaller than twice the first angle. Find the measure of the three
angles. Write your answers in the order of 1st angle, 2nd angle, 3rd angle.
anonymous
 5 years ago
The first angle of a triangle is 4° larger than twice the second angle. The third angle is 21° smaller than twice the first angle. Find the measure of the three angles. Write your answers in the order of 1st angle, 2nd angle, 3rd angle.

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0There are three unknowns. lets called them A, B, C. They are first, second and third angle. For three unknown we need three equations: First angle, A equals: A = 2B +R Third angle, C: C = 2A  21 The sum of all angles: A + B + C = 180. Solve the three equations.

radar
 5 years ago
Best ResponseYou've already chosen the best response.0Let x=Second angle then 2x+4 = First angle (given information) then 2(2x+4)21 = 3rd angle. What do we know about the sum of angles in a triangle? The sum is 180 degrees then x +2x+4 +2(2x+4)21 =180 simplifying 7x=189 or x=27 degrees Second angle is 27 degrees. Leaving the first and third angle for you as practice makes perfect!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Sorry, it is A= 2B + 4

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0u did well tenxz,what is A=2B+ 4 fits in the problem
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.