Question

USMZABC = 40'and BỎ is the anglebisector of ZABC3y+6B.3x-134-2xD5y-18MZABD =[ ? 1°Enter

Answer 1

We want to calculate the value of

`3x-1`

However, x is unknown. For BD is "angle bisector"

`3x-1=34-2x`

Let us solve that equation for x:

`3x+2x=34+1`

(-2x was sent to the left-hand side, and -1 was sent to the right-hand side)

`5x=35`
`x=7`

Then,

`3x-1=3(7)-1=21-1=20`

Thus,

`m\measuredangle ABD=20`