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pychu [463]
2 years ago
5

one angle of a triangle measures 120 degrees. the other two angles are congruent. write and solve an equation to find the measur

e of congruent angeles
Mathematics
1 answer:
Bogdan [553]2 years ago
3 0
The three angles of a triangle always add to 180, do the 2 congruent angles must measure 180-120=60. this number must be divided in two since the angles are congruent, so 60/2=30. [email protected], as needed. so the equation to find x, the size of the congruent angles, would be

x=(180-120)/2
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The perimeter of an equilateral triangle is 63 inches. If the length of each side is (4x-3), find the value of x.
balu736 [363]
Equilateral triangle have the same side lengths. Perimeter = sum of all sides
(4x - 3) + (4x - 3) + (4x - 3) = 63
Remove parentheses
4x - 3 + 4x - 3 + 4x - 3 = 63
Combine like terms
12x - 9 = 63
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Solution: x = 6
4 0
2 years ago
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2 years ago
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7 0
3 years ago
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pantera1 [17]

Answer:

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Step-by-step explanation:

Use the law of cosines:  c^2=a^2+b^2-2abcos(C)

Plug in the two sides we know (into a and b) and the angle we know (into angle C).

Thus:

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Use a calculator:

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(Note: Make sure you're in Degrees mode.)

3 0
2 years ago
Please help: (picture)
Slav-nsk [51]

We need to solve the speed formula for d. To do so, let's start by moving the number of the left hand side:


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So the closest answer is the last one: d=0.155km

3 0
3 years ago
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