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3 years ago

Can someone help me? Will make brainiest :)

Mathematics

2 answers:

kherson [118]3 years ago

8 0

Answer:

Step-by-step explanation:

BH is perpendicular to AC since an orthocenter is a point at which the three altitudes of a triangle intersect. The altitude of a triangle is that line that passes through its vertex and is perpendicular to the opposite side. Since you know that BH is an altitude due to Point H being an orthocenter, you know that BH is perpedendicular to AC.

swat323 years ago

3 0

I also agree that it is D

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Which classification best represents a triangle with a side lengths 6 cm,10 cm, and 12 cm ?

Luba_88 [7]

Answer:

It would be an obtuse scalene triangle.

EDITED TO ADD:

When given 3 triangle sides, to determine if the triangle is acute, right or obtuse:

1) Square all 3 sides.

2) Sum the squares of the 2 shortest sides.

3) Compare this sum to the square of the 3rd side.

if sum > 3rd side² Acute Triangle

if sum = 3rd side² Right Triangle

if sum < 3rd side² Obtuse Triangle

6^2 = 36

10^2 = 100

12^2=144

36 + 100 = 136 and this is less than 144 so it is an obtuse triangle.

Step-by-step explanation:

8 0

3 years ago

I promise I will mark as brainiest my watch was correct at noon, after which it started to lose 17 minutes per hour until 6 hour

Usimov [2.4K]

Answer:

Step-by-step explanation:

Take 17 away from 1:00 = 12:43

Take 17 away from 1:43 = 1:26

Take 17 away from 2:26 = 2:09

Take 17 away from 3:09 = 2:52

There we are: at the time which the watch says now.

Now let's see what the correct time should be:

at 12:43 it is really 1:00

at 1:26 it is really 2:00

at 2:09 it is really 3:00

at 2:52 it is really 4:00

However, it says the watch stopped 6 hours ago meaning that the time should be 10:00 as 4 + 6 = 10.

<h2>I'm always happy to help :)</h2>

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3 years ago

Use a sum or difference identity to find exact value of sin 255.

vagabundo [1.1K]

Sin (x + y) = sin x cos y + cos x sin y

<span>sin 255 </span>
<span>= sin (210 + 45) </span>
<span>= sin 210 cos 45 + cos 210 sin 45 </span>
<span>= (-1/2)(√(2)/2) + (-√(3)/2)(√(2)/2) </span>
<span>= -√(2)/4 + (-√(6)/4) </span>
<span>= -√(2)/4 - √(6)/4 </span>
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3 years ago

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e-lub [12.9K]

Answer:

$35

Step-by-step explanation:

You could just multiply

70 × .5

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balandron [24]

4-2(1)=
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