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solmaris [256]
3 years ago
6

Which letter in the word HAPPY has an order 2 rotational symmetry?

Mathematics
2 answers:
Rus_ich [418]3 years ago
8 0

Answer:a

Step-by-step explanation:

vovikov84 [41]3 years ago
4 0

Answer:

H

Step-by-step explanation:

Here only letter H maps onto itself 2 times in a rotation of 360°i.e.one at angle  180° and one at angle 360°.

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11.3d04
alexandr402 [8]

Answer:

yes

Step-by-step explanation: did it on test

4 0
3 years ago
ali sorced 66 and 72 marks respectively. for his two tests what is the lowest marks he must have sorced for his third test if an
dimaraw [331]

Answer:

87

Step-by-step explanation:

66 + 72 + 87 = 225

225 / 3 = 75

6 0
2 years ago
What relationship do the ratios of sin x° and cos y° share?
Assoli18 [71]

Answer:

sin(x) = cos(y)

Step-by-step explanation:

Let's figure out what sin(x) and cos(y) are before we figure out the relationship.

Sine is opposite / hypotenuse. Here, the opposite side to angle x is 12 and the hypotenuse is 13. So, sin(x) = 12/13.

Cosine is adjacent / hypotenuse. Here, the adjacent side of angle y is 12 and the hypotenuse is 13. So, cos(y) = 12/13.

Now we can see the relationship: sin(x) = cos(y)

In fact, for any right triangle with angles 90°, α°, and β°, where α and β can be any angle degree that add up to 90, the following relationships are true:

sin(α) = cos(β)

and

sin(β) = cos(α)

5 0
3 years ago
Read 2 more answers
Two​ trains, Train A and Train​ B, weigh a total of 379 tons. Train A is heavier than Train B. The difference of their weights i
BartSMP [9]

Answer: A = 317

B = 61

Step-by-step explanation:

The following equation can be gotten from the question given. This will be:

A + B = 379 ........ i

A - B = 255 ........ ii

From equation i, make A the subject of the formula

A = 379 - B ...... iii

Put the value of A in iii into equation ii

A - B = 255

(379 - B) - B = 255

379 - B - B = 255

379 - 2B = 255

2B = 379-255

2B = 124

B = 124/2

B = 62 tons

Since A + B = 379

A + 62 = 379

A = 379 - 62

A = 317 tons

4 0
3 years ago
Please help with this question! (Brainliest)
Korvikt [17]

Answer: -45j -9k

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
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