ABD: 22
DBC: 109
they are congruent angles
Answer:
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IF Factor x4−10x2+25
x4−10x2+25
=(x2−5)(x2−5)
Answer:
(x2−5)(x2−5)
IF simplify
x4−10x2+25
There are no like terms.
Answer:
=x4−10x2+25
Answer:
line l║line m
Step-by-step explanation:
See the diagram first.
Statement:
1. ∠ 2 and ∠ 5 are supplementary
Reason:
It is given
Statement:
2. ∠ 3 = ∠ 2
Reason:
They are opposite angles.
Statement:
3. ∠ 3 and ∠ 5 are supplementary
Reason:
As ∠ 3 = ∠ 2
Statement:
4. line l is parallel to line m
Reason:
Consecutive interior angles ∠ 3 and ∠ 5 are supplementary. (Answer)
For finding the perimeter of abc (triangle), we MUST need the two others coordinates of b and c
let b(1, 2) and c (2, -4)
we need to calculate the distances ab, ac, and bc
vector (ab)=(1-(-2), 2-9)=(3, -7), so its length is ab=sqrt(3²+ (-7)²)=7.61
realising the same method, we find bc=6.08, ac=13.60
so the perimeter of abc is P= ab+bc+ca=13.60+6.08+7.61=27.29
