Answer:
m∠ D = 110°.
Justification is below.
Step-by-step explanation:
Consider quadrilateral CDEF as a parallelogram,
Opposite sides of a parallelogram are parallel
∴ DE || CF
If two lines are parallel then the interior angles SUM is 180°
Angle C and Angle D are interior angles.
∴ m ∠C + m∠ D = 180°
Here
m ∠C = 70° {Given}
on substituting the above value we get
∴ 70 + m∠ D = 180°
∴ m∠ D = 180 - 70
∴ m∠ D = 110°
∴ m∠ D = 110° which is the required answer.
Slope of EF = 5/2
Slope of XY=4/3
Further explanation:
"Slope is the steepness of a line"
The formula for slope when two lines are given:

Now,
<u>1. E(2-1) and F(4,4)</u>

<u>2. X(1, 4) and Y(-2,0)</u>

Hence,
Slope of EF = 5/2
Slope of XY=4/3
Keywords: Slope, Slope Calculation
Learn more about slope at:
#LearnwithBrainly
Answer:
m=2
Step-by-step explanation: