The sum of the angles in a triangle is always 180°. Therefore, to find the measure of ∠DBC, we can subtract the measures of ∠ABD and ∠ABC from 180°.
∠DBC = 180° - ∠ABD - ∠ABC
∠DBC = 180° - 60° - 155°
∠DBC = 180° - 215°
∠DBC = -35°
Since angles cannot have negative measures, the correct response is 215°.
The measure of ∠ABD is 60° and the measure of ∠ABC is 155° . What is the measure of ∠DBC ?
(1 point)
Responses
95°
95 degrees
215°
215 degrees
155°
155 degrees
180°
1 answer