Answer: c.50 is the answer
B is the answer to this question
The distance formula as shown below:
The center is the midpoint of the diameter.
The coordinates of the midpoint:
(x₁,y₁) - the coordinates of one endpoint
(x₂,y₂) - the coordinates of the other endpoint
The coordinates of the center are (-1.5,4.5) - the answer is A.
Answer:
1). Corresponding angles
2). Vertical angles
Step-by-step explanation:
1). Lines 'k' and 'l' are the parallel lines and line 'm' is a transverse.
Since m∠ABC = 19°
Therefore, m∠ECF = 19° [Corresponding angles]
(By translating line 'l' from the points B to C, angle ABC overlaps angle ECF)
2). Since, ∠ECF and ∠BCD are the vertical angles they will be equal in measure.
Therefore, m∠ECF = m∠BCD = 19°