Answer:
C. ECA = BDA
Step-by-step explanation:
An angle is said to be produced whenever two or more lines meet at a point. An interior angle is an angle form within two lines meeting at a point. Then, alternate interior angles are internal angles that are equal due to alternate theorem. These angles should have equal measures.
From the given question, the alternate interior angles by the theorem is;
ECA = BDA
By the alternate interior angle theorem, the alternate interior angles are ECA and BDA. This implies that the measure of <ECA should be equal to the measure of <BDA.
It is the first one,
........ 20. 24
256a. b
If you are asking for the circumference of an arc (definition of arc is "a part of the circumference of a circle or other curve"), then the formula is:
x/360*r*2pi, where x is the angle in degrees and r is the radius.
note that if you want to find the circumference of the sector, the formula becomes
x/360*2*2pi + 2r,
where x is the angle in degrees and r is the radius.
