In the first question,
Since D is the midpoint of line segment AC.
therefore, AD=DC.
In triangles, ABD & CBD.
Since, AB is congruent to CB and BD is a common side between those two triangles.
Therefore, AD is congruent to DC.
Finally, in triangles DEA & DEC
Since, ED line segment is a common side between those triangles and the measure of angle EDA is as the same of angle EDC which are equal to 90 degrees and AD is congruent to DC.
Therefore, triangle EDA is congruent to triangle EDC ( you have to take care of the triangle order letters in congruence) and EC is congruent to EA.
Answer:
A. Inscribed angles theorem
Step-by-step explanation:
A.inscribed angles theorem
B.third corollary to the inscribed angles theorem
C.central angle of a triangle has the same measure as its intercepted arc.
D.Angle formed by a tangent and a chord is half the measure of the intercepted arc.
Just took the unit test on edgen and got 100
Answer:
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Answer:
x = 50
Step-by-step explanation:
55 degrees + (2x + 25) degrees = 180 degrees
55 + 25 + 2x = 180
80 + 2x = 180
2x = 100
x = 50
