The angles of a triangles are x°, 3x° and 30°. When asked to solve for x, Alvi shows the work in post-it A below. Brian shows th

Question

3 years ago

9

The angles of a triangles are x°, 3x° and 30°. When asked to solve for x, Alvi shows the work in post-it A below. Brian shows th

e work in post-it B below. Who is correct and why? Why mistake did the incorrect person make?
that is the pic for post it a.
the post it b said

x + 3x + 30 = 180
4x + 30 = 180
4x = 150
x = 37.5

Mathematics

1 answer:

klasskru [66] · Answer 1 · 2022-06-23T20:46:40+03:00

klasskru [66]3 years ago

8 0

Answer:

See explanation

Step-by-step explanation:

OK. Alvi is incorrect because he didn't add the measures of all 3 angles of the triangle, whereas Brian did. So, Brian is correct and Alvi needs to work on that kind of problem.