Zehraaa Zehraaa

14-01-2020
Mathematics

contestada

Pls help, it's 20 points

OA bisects measure of (a) 23
(b) 75
(c) 78.5
(d) 157

Pls help its 20 points OA bisects measure of a 23 b 75 c 785 d 157 class=

Respuesta :

devishri1977 devishri1977

14-01-2020

Answer:

C)78.5

Step-by-step explanation:

∠BOZ = X

∠WOB = 7X - 4

X + 7X -4 = 180 {STRAIGHT LINE }

8X = 180 + 4

8X = 184

X = 184/8

X = 23

∠WOB = 7X - 4 = 7*23 - 4 = 161 - 4 = 157

OA bisects ∠WOB. So, ∠WOA =∠AOB

∠AOB = 1/2 of ∠WOB = 157/2 = 78.5

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