|
Question 487339: if the measure of angle ABD =4x+15 and the measure of angle DBC = 2x+45 , find the degree measure of angle DBC. i just dont remember how to find x
Answer by cleomenius(959)   (Show Source):
You can put this solution on YOUR website! You need more information.
Usually in this type of problem, the angles are either complementary or supplementary. Occasionally, they may be congruent.
If they are complementary, 4x + 15 + 2x + 45 = 90.
6x + 60 = 90
6x = 30
x = 5
4x + 15 = 35 degrees.
2x + 45 = 55 degrees.
35 + 55 = 90 degrees.
=====================
If they are supplementary, 4x + 15 + 2x + 45 = 180.
6x + 60 = 180
6x = 120
x = 20
4x + 15 = 95 degrees
2x + 45 = 85 degrees
95 + 85 = 180 degrees.
==========================
If they are congruent, 4x + 15 = 2x + 45
2x = 30
x = 15 degrees.
4(15) + 15 = 75 = 2(15) + 45.
Cleomenius.
|
|
|
| |
