Answer: C. 53º, 55º
Step-by-step explanation:
1. By definition, the sum of the interior angles of a triangle is 180 degrees.
2. Keeping this on mind, you have:
As you can see, the sum of the other two angles must be 108 degrees, then, let's add the angles given in each option:
A. 9°+9°=18
B. 26°+46°=72°
C. 53°+55°=108°
D. 72°+108°=180°
3. Therefore, the answer is the option C.
Answer:
Perpendicular
Step-by-step explanation:
Calculate the slopes m of the segments using the slope formula.
m =
Parallel lines have equal slopes
The product of the slopes of perpendicular lines equals - 1
(x₁, y₁ ) = A(0, 0) and (x₂, y₂ ) = B(e, f)
=
=
Repeat with (x₁, y₁ ) = C(0, e) and (x₂, y₂ ) = D(f, 0)
=
= -
Thus AB and CD are perpendicular since × -
= - 1