Can you pls help me????

Question

asked Mar 1, 2023 192k views

2 Answers

Oded Harth · Answer 1 · 2023-03-07T18:46:57+0000

Answer:

The measure of non-reflex ∠DOB is 108° and the measure of reflex ∠DOB is 252°.

Step-by-step explanation:

$DOB = AOD + AOC + COB \\\\3.5y = y + 180\\3.5y - y = y + 180 - y\\2.5y = 180\\(2.5y)/(2.5) = (180)/(2.5) \\y = 72\\$

Hence y = 72, so in the equation replace y with 72.

$3.5y \\3.5(72)\\252\\$

DOB = 360 - 252 = 108

So, the angle DOB is 108 degrees and the reflex angle DOB is 252 degrees.