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3 years ago

What is the first step in proving that the sum of the measures of triangle XYZ is 180 degrees?

1 answer:

6 0

In geometry, the definition of a triangle is a two-dimensional closed figure with three sides. Aside from this, it is proven that the sum of the angles of a triangle is 180°. This is a triangle's innate property. Therefore, any closed shape with three sides is a triangle and it follows that the sum of the three angles is equal to 180°.

It is logical therefore, that the first step in proving this is by using the definition of a triangle.

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A b c or d? help me

kotegsom [21]

Answer:

B.) $\frac{1}{2} +8$

Step-by-step explanation:

$\frac{1}{2}-(-8)$

A negative and a negative equals a positive. Remove parentheses and simplify

$\frac{1}{2}+8$

Done.

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3 years ago

Read 2 more answers

Pls help due in 10 mins

nikitadnepr [17]

Answer:

Area = 97.4 cm²

Step-by-step explanation:

a = 15 cm

$Area = \frac{ \sqrt 3}{4} a^2\\$

$=\frac{\sqrt 3}{ 4 } \times 15^2\\\\=\frac{\sqrt 3}{ 4 } \times 225\\\\= 97.4 \ cm^2$

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3 years ago

If two angles are supplementary and congruent, what is the measure of each angle?

matrenka [14]

Answer:

Step-by-step explanation:

supplementary angles equal 180 degrees and 90+90=180

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2 years ago

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What is the equation for the line of reflection? On a coordinate plane, triangle A B C has points (6, 3.7), (5.4, 2), (1, 3). Tr

elixir [45]

Answer:

The equation for the line of reflection will be x = y.

Step-by-step explanation:

On a coordinate plane, triangle Δ ABC has points (6, 3.7), (5.4, 2), (1, 3). Triangle Δ A'B'C' has points (3.7, 6), (2, 5.4), (3, 1).

And we have to find the equation of the line of reflection of the points.

Now, it is clear from the coordinates of vertices of Δ ABC and Δ A'B'C' that after reflection the x and y-values of the respective coordinates interchange and there is no change in signs.

Therefore, the equation for the line of reflection will be x = y. (Answer)

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3 years ago

Read 2 more answers

- Write a system of equations in which one equation could be multiplied by-2 and the

iris [78.8K]

2x+5y=9

3x+7y=13

6x+15y=27

-6x-14y=-26

y=1

x=2

6 0

3 years ago