All categories

2 years ago

Select all the polygons that have reflection symmetry.

Mathematics

1 answer:

mart [117]2 years ago

3 0

Reflection Symmetry-

Line symmetry is also called as the reflection symmetry. If, at least one line that divides a figure into two halves such that one-half is the mirror image of the other half, exists, then the figure is said to be in reflection symmetry.

Analyzing all the 4 figures, it can be deduced that only 1st and 2nd figures have one symmetry line XX, as shown in the attachments.

3rd and 4th figures do not have any axisymmetric lines, so they are not in reflection symmetry.

You might be interested in

Cody wants to join the army for a career and he also wants a wife and kid. If he gets paid $25000 a year will he be able to affo

RSB [31]

Yes, if that is the expenses he has to pay for all three of them. All you have to do is add up the all his expenses and multiple by 12

6 0

4 years ago

Anne bought a new pair of shoes. She got 20% off the regular price. If she paid $40, what was the regular price of the shoes bef

Charra [1.4K]

I believe the answer is 50, hope this helps

5 0

3 years ago

Solve the following equation: (Find x) a) (x-5)²+(2x-10)(x+3)-x²+25

Alex73 [517]

Answer:

hence the value of x is either 5 or 2

x=5 or x=2

4 0

2 years ago

In a cartons of bulbs, 90% contain no defective bulbs, 5% contain one defective bulb, 3% contain two defective bulbs, and 2% con

hodyreva [135]

Answer:

Mean, E(x) = 0.17

Variance, V(x) = 0.12

Step-by-step explanation:

90% contains no defective bulbs, P(X=0) = 0.9

5% contain one defective bulbs, P(X=1) = 0.05

3% contain two defective bulbs, P(X=2) = 0.03

2% contain three defective bulbs, P(X=3) = 0.02

The mean for the number of defective bulbs:

$E(X) = \sum XP(X)\\E(X) = (0*0.9) + (1*0.05) + (2*0.03) + (3* 0.02)\\E(X) = 0 + 0.05 + 0.06 + 0.06\\E(X) = 0.17$

Variance for the defective bulbs:

$V(x) = (\sum x^{2}P(x) ) - \mu^2$

$\sum x^{2}P(x) = (0^2*0.9) + (1^2*0.05) + (2^2*0.03) + (3^2* 0.02)\\\sum x^{2}P(x) = 0.05 + 0.12 + 0.12\\\sum x^{2}P(x) = 0.29$

V(x) = 0.29 - 0.17

V(x) = 0.12

7 0

3 years ago

A bee farm can produce 1.24 L of honey every week. But during the last week of may, due to change of weather, the production was

siniylev [52]

Answer:

820 ml

Step-by-step explanation:

1000ml = 1 L
1.23 L = 1240 ml
1240 ml - 420 ml = 820 ml

6 0

3 years ago