Two angles are vertical
Hypothesis is after “if” but before “then”
Answer:
Step-by-step explanation:
Consider triangles BKE and DKA. In this triangles:
as vertical angles;
as alternate interior angles (lines BC and AD are parallel and BC is a transversal);
as alternate interior angles (lines BC and AD are parallel and BE is a transversal).
Thus triangles BKE and DKA are similar by AA theorem. Similar triangles have proportional sides lengths:
Thus, 
Since AD=BC and BC=BE+CE, we have that 4BE=BE+EC, EC=3BE. Hence, the ratio BE to EC is
Only thing I can tell you is to use a corner to a piece of paper. The corner is 90 degrees. It's acute if the corner is bigger than the angle. Obtuse if its smaller.
Answer/Step-by-step explanation:
7m + 11 = -4(2m + 3)
<u>Use distributive property:</u>
7m + 11 = -8m - 12
<em>Therefore the equations are equivilent!</em>
<h2><u><em>
Will gladly take Brainliest, please!!!</em></u><em>
=D</em></h2>
