The third and fourth ones are correct
For a segment AB, the coordinates of the middle point C are:
xc=(xa+xb)/2,
yc=(ya+yb)/2.
Now, you know points A and C. Thus we get:
xb=2×xc-xa
yb=2×yc-ya
With numerical values:
xb=2×2-(-1)=4+1=5
yb=2×3-(-5)=6+5=11
Answer: B(5, 11)
Answer:
Step-by-step explanation:
Diagonals are perpendicular
no parallel sides
1 parallel of congruent angles
only these
In geometry, complementary angles are at least a group of two angles that sum up to 90° or a right angle. So, suppose the two unknown complementary angles are α and β. Then,
α + β = 90°
Since there are two unknowns, we nee two independent equations as well. Thus, we need another equation to solve the system. That comes from the relationship between α and β. Suppose α is greater than β. Then,
α = 44*β
Substituting this to the first equation,
44β + β = 90
45β = 90
β = 2°
Then, knowing that β is 2°,
α = 90 - 2 = 88°
Therefore, the complementary angles are 2° and 88°.
