9x2-1............................................................................
If BD is congruent to BC, that means that the sides are equal, so their angles are too.
6x-9 = 3x+24
3x = 33
x = 33/3
x = 11
Angle BCD:
6×11-9 = 66-9 =57°
Angle BDC:
3×11+24 = 33+24 = 57°
Angle B:
x = 180° - 2×57°
x = 66°
149
How to:
A four sided shape equals to 360 degrees
Answer:
2d, 3b
Step-by-step explanation:
pay attention in class
these are simple theorems
i wish you all the best
if you want, i can explain them to you
