Răspuns:
a) OC = 18cm
b) MN = 6cm
Explicație pas cu pas:
Găsiți diagrama la întrebarea atașată.
a) Din diagramă se poate observa că OC = OA + AB + AC
OC = 2n + 2n + 2 + 2n + 4
OC = 6n + 6
Următorul este să obțineți valoarea lui n:
OM = OA + AM
Să obținem segmentul AM;
Deoarece M este segmentul mijlociu al AC, atunci;
AM = AC / 2
AM = AB + BC / 2
AM = 2n + 2 + 2n + 4/2
AM = 4n + 6/2
AM = 2n + 3
Din moment ce OM = OA + AM
OM = 2n + 2n + 3
OM = 4n + 3
Dat fiind OM = 11
11 = 4n + 3
4n = 11-3
4n = 8
n = 2
Următorul pas este să calculați OC;
OC = 6n + 6
OC = 6 (2) + 6
OC = 18
Prin urmare, lungimea segmentului OC este de 18 cm
b) Această întrebare ne cere să găsim segmentul de linie MN.
Din diagramă, MN = AM - AN
Deoarece AM = 2n + 3 din întrebarea 1;
AM = 2 (2) +3
AM = 4 + 3
AM = 7
Acum, să obținem AN:
Din diagramă, AN = ON-OA și ON = OB / 2
AN = OB / 2 - OA
AN = (2n + 2n + 2) / 2 - 2n
AN = 4n + 2/2 - 2n
AN = 2n + 1 - 2n
AN = 2n-2n + 1
AN = 1
De la MN = AM - AN
MN = 7 - 1
MN = 6cm
Prin urmare, distanța dintre N, mijlocul segmentului OB și punctul M este de 6cm
.2 converted to a fraction would be 1/5
The answer in expanded form?
Answer: 9
Step-by-step explanation:
An elf ate 15 of your muffins and that was 5/8 of all of them. To get the number of muffins left goes thus:
We can first calculate the total number of muffins the person had. Let the total number of muffins be y. That means the elf ate 5/8 of y.
5/8 of y = 15
5/8 × y = 15
0.625 × y = 15
0.625y = 15
Divide both side by 0.625
0.625y/0.625 = 15/0.625
y = 24
The total amount of muffins is 24. Since the elf has eaten 15, the amount left will be: 24-15 = 9
Answer:
The 3rd option
Step-by-step explanation:
To prove that 2 triangles are similar, we need to prove that 2 pairs of their angle measurements are congruent.
This is because all triangles have 180 degrees, so if 2 pairs are congruent, the remaining angles will also be congruent
We know that m<D=m<E
We also know that m<DCA=m<ECB because they are vertical angles.
Vertical angles are always congruent.
Therefore, the triangles are similar.
The correct similarity statement would be 1, since <D corresponds with <E.
Now let's look at the 3rd Statement. To prove that two lines are similar, we would have to prove that their alternate interior angles are congruent.
A pair of alternate interior angles would be <D and B or or <E and <A
There is no way to prove this, since we do not know any of the angle or that measurements or if the triangles are isosceles triangles.
Hence, the correct choice would be 1 only.
