3 years ago

Help on all pls i need it quick

Mathematics

1 answer:

Tpy6a [65]3 years ago

4 0

Answer:

angle 7 is congruent to angle 6 because both are vertical angles and vertical angles are congruent to one another

angle 6 and angle 10 are congruent because both are corresponding angles and corresponding angles are congruent

thus angle 7 is congruent to angle 10 because vertical angles

Step-by-step explanation:

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Alex73 [517]

Answer:

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Step-by-step explanation:

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(x+4)(2x-23)

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3 years ago

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Gre4nikov [31]

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A triangle has sides of length 2, 2, and 3. Which of the following is the measure of the obtuse angle of the triangle?

kramer

Answer:

$97.18^{\circ}$

Step-by-step explanation:

An obtuse angle in the triangle is opposite to the greatest side. The greatest side in the triangle with sides lengths 2, 2 and 3 is side with length 3. By the cosine rule,

$3^2=2^2+2^2-2\cdot 2\cdot 2\cdot \cos \alpha,\\ \\9=4+4-8\cos \alpha,\\ \\-8\cos \alpha=9-4-4=1,\\ \\\cos \alpha=-\dfrac{1}{8},\\ \\\alpha\approx 97.18^{\circ}.$