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Viktor [21]
3 years ago
10

If angle 2 measures 155 degrees in the image below, what is the measurement of angle 1?

Mathematics
1 answer:
kumpel [21]3 years ago
6 0

Answer:

diagram of truss with some angles missing

What are the measures of the angles located at positions a, b, & c? Note: the figure is symmetrical on the vertical through angle b.

The large triangle is an isosceles triangle. The two angles on the base are equal. Angle a = 35°

We now know two angles in the largest triangle. The third angle, angle b must add to these to make 180°.  

35° + 35° + b = 180°

b = 180° - 70°

b = 110°

We now know two angles in a quadrilateral. The two unknown angles, including angle c are equal. All four angles add up to 360°.  

2c + 110° + 120° = 360°

2c = 360° - 230°

2c = 130°

c = 65°

Step-by-step explanation:

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Novosadov [1.4K]
Any number in power "0" should give 1.
8 0
3 years ago
Triangular numbers can be represented with equilateral triangles formed by dots the first fire triangle numbers are 1 3 6 10 and
zhannawk [14.2K]

Answer:

There's no direct variation

Step-by-step explanation:

Required

Determine if there's a direct variation between the number and its position

I'll start by giving an illustration of how the triangle is represented using stars (*)

*

**

***

****

*****

Represent the line number with y and it's position with x

On line 1:

y = 1, x = 1

On line 2:

y = 2, x = 3

On line 3:

y = 3, x = 6

On line 4:

y = 4, x = 10

On line 5:

y = 5, x = 15

Note that, x is gotten by calculating the accumulated number of stars while y is the line number.

Direct variation is represented by

y = kx

Or

kx = y

Where k is the constant of variation

For line 1:

Substitute 1 for y and 1 for x

k * 1 = 1

k = 1

For line 2:

Substitute 2 for y and 3 for x

k * 3 = 2

Divide through by 3

k = ⅔

Note that the values of k in both computations differ.

This implies that there's no direct variation and there's no need to check further.

3 0
3 years ago
Those are the answer choices! ^
dybincka [34]

Answer:

I think its c bc (PEMDAS) shoes multiplication comes first

7 0
3 years ago
Read 2 more answers
PLEASE HELP FAST!!! A ladder leans against a building. The top of the ladder reaches a point on the building, which is 18 feet a
weeeeeb [17]

The measure of the angle of elevation from the ground to the top of the ladder is 68.73 degrees

<h3>Angle of elevation and depression</h3>

These method is used to determine the side and angles of a triangle

From the question given, we have the following parameters

Base of the building = 7feet (Adjacent side)

Height of the building = 18 feet (Opposite side)

Required

angle of elevation of the building

Using the SOH CAH TOA identity

tanФ = opp/adj

tanФ = 18/7

Ф = 68.73 degrees

Hence the measure of the angle of elevation from the ground to the top of the ladder is 68.73 degrees

Learn more on angle of elevation here: brainly.com/question/88158

#SPJ1

<em />

3 0
2 years ago
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B5%20%7D%20%20%3D%20%20%5Cfrac%7Bx%20%2B%202%7D%7B2%7D%20" id="TexFormula1"
meriva

\dfrac{x+2}{2}=\dfrac{4}{5}\ \ \ \ \ |\text{cross multiply}\\\\5(x+2)=(4)(2)\ \ \ \ \ |\text{use distributive property}\\\\(5)(x)+(5)(2)=8\\\\5x+10=8\ \ \ \ |\text{subtract 10 from both sides}\\\\5x=-2\ \ \ \ \ |\text{divide both sides by 5}\\\\\boxed{x=-\dfrac{2}{5}}

6 0
3 years ago
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