Answer:
D
Step-by-step explanation:
BD is a mid- line segment and is one half the length of AE, that is
BD = 0.5 × 21 = 10.5 → d
Answer:
see explanation
Step-by-step explanation:
Calculate the slopes between pairs of the 3 points using the slope formula
m =
with (x₁, y₁ ) = (- 9, 3) and (x₂, y₂ ) = (- 3, 9)
m = = = = 1
Repeat with (x₁, y₁ ) = (5, 1) and (x₂, y₂ ) = (- 3, 9)
m = = = - 1
If lines are perpendicular then the product of their slopes = - 1 , then
1 × - 1 = -1
Thus there is a right angle between the 2 lines
Then triangle is right- angled
24 divided by 12 equals 2
12 multiplied by 2 equals 24
Hope this answers your question, not worded very well