Using square ABCD, calculate the measure of ZEDC, if mZECD = 45°. =
2 answers:
Answer:
45°
Step-by-step explanation:
Two diagonals of a square intersect at right angle, I.e., 90°
BD and AC are two such diagonals of the square ABCD.
Since, they intersect at 90°:
∠DEC = 90°
We're given the value of ∠ECD and that is 45°
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
<h3><u>Observing</u><u> </u><u>Triangle EDC:</u></h3><em>Sum of all angles in a triangle = 180°</em>
=> ∠DEC + ∠ECD + ∠EDC = 180°
=> 90 + 45 + ∠EDC = 180°
=> 135 + ∠EDC = 180
=> ∠EDC = 180 - 135
<u>=> ∠EDC = 45</u>
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
<h3><u>Answer</u><u>:</u></h3>Hence, we know the value of ∠EDC and that is 45°
You might be interested in
The equation for the line of best fit, the good approximation for x when f(x) = 30 is 20.
Given that
The equation for the line of best fit is f(x) = 1.8x − 5.4 for the set of values in the table.
A 2-column table with 7 rows.
The first column is labeled x with entries 4, 5, 6, 6, 8, 9, 10.
The second column is labeled f(x) with entries 5, 2, 5, 6, 8, 7, 18.
We have to determine
Using the equation for the line of best fit, what is a good approximation for x when f(x) = 30?
According to the question
The quadratic regression equation can be expressed as;
Then,
The approximation for x when f(x) = 30 is,
Hence, the equation for the line of best fit, the good approximation for x when f(x) = 30 is 20.
To know more about the Quadratic equation click the link given below.