Hey there!
Triangle CBD is congruent to triangle ABD. This means that BD is congruent to BD by reflexive property. You have two congruent angles, and one congruent side. This would be AAS theorem. The answer is D.
I hope this helps!
Answer:
D) 15
Step-by-step explanation:
The sum of the interior angles of a polygon is given by

We have that, the sum of the interior angles of a polygon is
26 right angles. We want to find n, the number of sides.
We substitute into the formula to get:

Divide through by 90

Divide through by 2



The line rising to the right has equation y = x + 2
and the other one has equation y = -x + 4
the lines are solid so the inequalities will be <= or >=
in both case the shading is below so the sign is <=
also x and Y values are both positive
so the answer is choice C
The answer would be 1
Slope formula is y2-y1/x2-x1
8-2/8-2
6/6
1