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3 years ago

7

Whatt is the answer?

2 answers:

katovenus [111]3 years ago

8 0

Answer:

4

Step-by-step explanation:

In a equilateral triangle, all angles are 60 degree, so 10x+20=60

10x=40

x=4

vfiekz [6]3 years ago

4 0

Answer:

x = 4

Step-by-step explanation:

An equilateral triangle means that all three sides are equal. All triangles have an inner angle measure of 180 degrees. Divide 180 by 3 to find out a singular angle's measure. You end up with : 10x + 20 = 60. In order to isolate the 10x, subtract 20 from both sides. This gives you 10x = 40. Thus, x = 4.

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Find x round to the nearest tenth

jeka94

<h3>Answer: angle X = 70.5 degrees</h3>

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Work Shown:

Law of Cosines

c^2 = a^2 + b^2 - 2ab*cos(C)

22^2 = 20^2 + 18^2 - 2*20*18*cos(X)

484 = 724 - 720*cos(X)

484 + 720*cos(X) = 724

720*cos(X) = 724 - 484

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Make sure your calculator is in degree mode.

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3 years ago

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Step-by-step explanation:

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2 years ago

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Mandarinka [93]

It answers is b 0.5 candy

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2 years ago

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Find the area of a triangle who's side lengths are 13, 14, and 15. (The questions doesn't tell the type of triangle.)

Y_Kistochka [10]

Answer:

84 square units.

Step-by-step explanation:

<h2>Area of scalene triangle:</h2>

$\sf \boxed{\bf Area = \sqrt{s*(s-a)(s-b)*(s-c)}}$

Here, a, b and c are the sides of the triangle. s is the semi perimeter.

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1 year ago

ad-work [718]

Answer:

Use the Pythagorean Theorem in reverse by using Subtraction:

Step-by-step explanation:

$\displaystyle a^2 + b^2 = c^2 \\ \\ -b^2 + c^2 = a^2\:OR\:-a^2 + c^2 = b^2$

I am joyous to assist you anytime.

3 0

2 years ago