Can someone help me with this? I need this done today....

Mathematics

2 answers:

diamong [38]3 years ago

7 0

Answer:

2ND SLIDE(ORANGE)

Step-by-step explanation:

1. 2x+90=180; x=45

2. 2x+88=180; x=46

3. 3x+15=180; x=55

lana66690 [7]3 years ago

5 0

I think the first photo, to find the answer, you have to add two sides together. If they are greater than the third, it’s a triangle. If not, then it’s not a triangle.

For A on the slide with 4 cards, the two angles labeled x are equal to each other. A triangle has 180 degrees. Subtract the given angle from 180 and divide by two.

I think those clues can Apple to most of the other pictures. That’s the most I can remember from my geometry class.

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3 years ago

3 parts: List the ratios for using angle A as the angle of reference reduce when necessary

dezoksy [38]

Answer:

$\sin{A}=21/29\\\cos{A}=20/29\\\tan{A}=21/20$

Step-by-step explanation:

The sine of an angle in a right triangle is the ratio of the side across from the angle with the hypotenuse of the triangle (the hypotenuse is the side across from the right angle). In this case, the sine of angle A, shortened to $\sin{A}$ , is $21/29$ .

Cosine is short for "complementary sine." If the angles A + C = 90, the cosine of A is equal to the sine of C, since A and C are complementary. So $\cos{A}=\sin{C}=20/29$ . Notice that this ratio is the same as the ratio of the side adjacent to angle A (AB), to the hypotenuse.