Given: ΔABC m∠1=m∠2
D∈
AC
, BD = DC
m∠BDC = 100°
Find: m∠A, m∠B, m∠C

, and

Step-by-step explanation:

We  are given that BD = DC

BD= DC

So, (Opposite angles of equal sides are equal) ----1

We are given that ∠BDC = 100°

In ΔBDC

Angle sum property of triangle : The sum of all angles of triangle is 180°

So,

(Using 1)

So,

We are given that

So,

Now(Linear pair)

In ΔABD

(Angle sum property)

So,

Hence , and

spinning a 1, 2, or 3. option d.

step-by-step explanation: when spinning a number graph up to 4, and aiming for any number less than 3, that automatically eliminates the number 4. now you have two numbers to spin on that are less than 3, but the number 3 is included in this question because it's no greater of an number than itself. i hope this you : )