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2 years ago

Explain 2 features (properties) of a parallelogram that could be used to prove 2 sides congruent in a triangle congruence proof.

Mathematics

1 answer:

Y_Kistochka [10]2 years ago

6 0

My answer is Pentagon and Square

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Find sin theta if theta is an angle in standard position and the point with coordinates (3, -4) lies on the terminal side of an

alisha [4.7K]

Answer:

$\sin \theta=-\frac{4}{5}$

Step-by-step explanation:

Given:

Angle is in standard position which means the starting ray is at the origin. The terminal side has coordinates (3, -4).

So, the 'x' value is 3 and 'y' value id -4.

Using Pythagoras Theorem, we find the hypotenuse.

Hypotenuse = $\sqrt{3^2+(-4)^2}=\sqrt{9+16}=\sqrt{25}=5$

Now, using the sine ratio for the angle, we have

$\sin \theta=\frac{Opposite}{Hypotenuse}\\\sin \theta=\frac{-4}{5}\\\sin \theta=-\frac{4}{5}$

Therefore, the value of $\sin \theta$ is $-\frac{4}{5}$ .

The value is negative as the point (3, -4) lies in the fourth quadrant and sine ratio is negative in the fourth quadrant,

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2 years ago

Which of the following distances round to 4 m if we're rounding to the nearest meter?

jeka57 [31]

3 & 3
Can someone help me with this

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2 years ago

A bicycle store also sells tricycles.

storchak [24]

The answer is 18 because 3 times 6 is 18

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3 years ago

What is the perimeter for this shape?

Ostrovityanka [42]

Answer:

the perimeter for this shape is 550 in

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3 years ago

Read 2 more answers

What is the coordinate of the vertex? Help

Ilya [14]

Answer: (6,-20)

Explanation:
The equation f(x) = -(x-6)^2 - 20 is the same as y = -1(x-6)^2 + (-20)
It is in the form y = a(x-h)^2 + k
The vertex is (h,k)
In this case, h = 6 and k = -20
So that's why the vertex is (6,-20)

3 0

3 years ago