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DIA [1.3K]
2 years ago
6

Find the size of the unknown angle in the triangle​

Mathematics
2 answers:
Bas_tet [7]2 years ago
8 0

Answer:

x = 48

Step-by-step explanation:

The sum of the angles of a triangle is 180

60+72+x = 180

132+x = 180

x = 180-132

x =48

IrinaVladis [17]2 years ago
5 0

Answer:

48

Step-by-step explanation:

180 - 72 - 60 = 48

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10 rubber stamps cost
polet [3.4K]

Answer:

A.

Step-by-step explanation:

each one is $1.03

so if you want 2 stamps they would be $2.06

7 0
3 years ago
Please help me do this one complicated and confused
IrinaK [193]

Answer:

9

Step-by-step explanation:

Area of a triangle=(base*height)/2

1) Input the values

54=(12h)/2

2) Multiply both sides by 2

54*2=(12h/2)2

108=12h

3) Divide both sides by 12

108/12=12h/12

9=h

I hope this helps! Please comment if you have any questions.

3 0
3 years ago
Read 2 more answers
Prove that sin^4x + cos^4x= sinxcosx
yKpoI14uk [10]

Answer:

(the relation you wrote is not correct, there may be something missing, so I will simplify the initial expression)

Here we have the equation:

sin^4(x) + cos^4(x)

We can rewrite this as:

(sin^2(x))^2 + (cos^2(x))^2

Now we can add and subtract cos^2(x)*sin^2(x) to get:

(sin^2(x))^2 + (cos^2(x))^2 + 2*cos^2(x)*sin^2(x) - 2*cos^2(x)*sin^2(x)

We can complete squares to get:

(cos^2(x) + sin^2(x))^2 - 2*cos(x)^2*sin(x)^2

and we know that:

cos^2(x) + sin^2(x) = 1

then:

1 - 2*sin(x)^2*cos(x)^2

This is the closest expression to what you wrote.

We also know that:

sin(x)*cos(x) = (1/2)*sin(2*x)

If we replace that, we get:

1 - \frac{sin^2(2*x)}{2}

Then the simplification is:

cos^4(x) + sin^4(x)  = 1 - \frac{sin^2(2*x)}{2}

7 0
3 years ago
I NEED HELP BEING TIMED
Vedmedyk [2.9K]
Acute scalene because they are all smaller than 90 degrees but different lengths
5 0
3 years ago
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What is the approximate value of 200,000 x 200
Nesterboy [21]

it would be 40000000 because there there are 7 zeroes and then you and then you multiply the two twos together and then put it in the front.

3 0
3 years ago
Read 2 more answers
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