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2 years ago

What is the area of this triangle?

Mathematics

2 answers:

Maksim231197 [3]2 years ago

7 0

Answer:

Step-by-step explanation:

area of triangle = (H*B)/2

(H*B)/2= (12*3)/2= 36/2=18

icang [17]2 years ago

5 0

Answer: 18

Step-by-step explanation: The formula for calculating a triangle’s area is 1/2(base•height). This means that 12•3 is 36, which multiplied by 1/2 is 18.

(Hope this helps)

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Fill in the blanks to complete the sentences about zero pairs.

Svetlanka [38]

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A zero pair could be -11 + 11

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2 years ago

Find the value of x² - x+1 when x=√3 -1, in the form a+b√3 where a and b are integers

lidiya [134]

Answer:

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

Step-by-step explanation:

We are given $x=\sqrt{3}-1$ and we are asked to find the value of $x^2-x+1$ .

So we will need to find $x^2$ .

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Square both sides:

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Expand using identity: $(x-a)^2=x^2-2ax+a^2$ .

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$x^2=3-2\sqrt{3}+1$

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$x^2-x+1$

$(4-2\sqrt{3})-(\sqrt{3}-1)+1$

$4-2\sqrt{3}-\sqrt{3}+1+1$

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3 years ago

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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