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3 years ago

How many lines of symmetry does a rhombus that is not a square have?

Mathematics

1 answer:

adoni [48]3 years ago

7 0

Look ar the picture.

Your answer: 2 lines of symmetry.

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I think it the third one but need a double check

makkiz [27]

Answer:

The first answer is correct.

Step-by-step explanation:

Line 5 says that the reason is due to substitution

Line 3 says m∠ SQT equals 180°

If we substitute 180° into the spot for m∠ SQT in line 4, we get solution option 1

8 0

3 years ago

Write rational number in number line -7 upon 2

Leno4ka [110]

Answer:

el numero 1

Step-by-step explanation:

7 0

2 years ago

Cos^2x+4cosx+4/cosx+2=2secx+1/secx

Lorico [155]

Answer:

$\frac{\cos^2x+4\cos x+4}{\cos x+2}=\frac{2\sec x+1}{\sec x}$

Step-by-step explanation:

To prove the given identity, we solve the left hand side and right hand side expressions and show that they are equal.

So we get $\frac{2\sec x+1}{\sec x}\\\\=\frac{2\sec x}{\sec x}+\frac{1}{\sec x}\\\\= 2+\cos x\\\\\text{since the left hand side and right hand side expression are same, so}\\\text{it verifies the identity.}$

$\text{Left hand side}=\frac{\cos^2x+4\cos x+4}{\cos x+2}\\\\\text{Here observe that the numerator is a perfect square using }\\a^2+2ab+b^2=(a+b)^2\\\text{so we get}\\\\=\frac{(\cos x+2)^2}{\cos x+2}\\\\\text{now we can cancel out one factor (cos x+2) from numerator and denominator.}\\\text{so we get}\\\\=\cos x+2\\\\\text{And similarly the right hand side gives}$

7 0

3 years ago

The Cookie Monster has 18 pounds of cookies on Monday.on the same day he ate 1/3 of his stash on Tuesday he ate 5/6 of what was

seraphim [82]

On Monday, he ate 1/3 of 18 pounds, so he ate 6 pounds of cookies on Monday.

This leaves 18 - 6 = 12 pounds remaining.

On Tuesday, he ate 5/6 of 12 pounds, so he ate 10 pounds of cookies on Tuesday.

This leaves 12 - 10 = 2 pounds remaining.

3 0

3 years ago

Linda travels 42 miles in 1 2/5 hours. What is linda’s average rate of travel (speed) in miles per hour?

Iteru [2.4K]

Find her unit rate:

42 miles
------------ = 30 miles/hour
1.4 hrs

4 0

3 years ago