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MrRa [10]
3 years ago
12

What is an exterior angle of a triangle ABC 4 7 12 1

Mathematics
1 answer:
KonstantinChe [14]3 years ago
5 0

Answer:

An exterior angle of the triangle ABC would be ∠1.

Explanation:

Exterior Angles: (See attached image)

Lets say you had a polygon (such as the triangle ABC) and you were to take two adjacent sides of that polygon. Lets call the side a and side b. If you were to extend side a, make a y-ish shape between side b and the extended side a. The angle between side b and the "new" part of side a would be the exterior angle.

(See attached image for better understanding.)

Using this, we can find all of the exterior angles of the triangle ABC. They would be ∠1, ∠3, ∠6, ∠8, ∠9, ∠11.

If we look at the answer choices, we will see that ∠1 is one of the answer choices, making ∠1 the solution to this question.

I hope you find my answer helpful. :)

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I need help i will mark brainliest
Kipish [7]

Answer:

Both triangles are scalene & Both triangles have an obtuse angle.

Step-by-step explanation:

<u>Key skills needed: Triangle recognition, Comparing Triangles</u>

1) We are given those 2 triangles, and we need to see if they are isosceles, scalene, obtuse, and acute.

2) To get this, let's define each thing:

Acute triangle - Means that all the angles in triangle are acute, which means they are less than 90 degrees in measure.

Obtuse triangle - Means that one angle in the triangle is obtuse, which means it is greater than 90 degrees in measure.

Scalene triangle - All the sides of the triangle are different in size/length

Isosceles triangle - 2 sides of the triangle are the same length

3) Now, we can use this to see what both triangles are:

--> Both triangles are not isosceles, they are both scalene. This is because all the sides of each triangle are different in size/length. This makes it scalene.

--> Both triangles are not acute triangles, they are both obtuse triangles. This is since the largest angle in each triangle is clear an obtuse angle (it looks like it is more than 90 degrees). Refer to the image I post as help.

With the observations above: We can say that both triangles are scalene, and both triangles are obtuse triangles.

<em>Hope you understood and have a nice day!! :D</em>

7 0
3 years ago
What is the area of the triangle in the coordinate plane?
Sophie [7]
<span>49.0 units2

1/2 x 7 x 14</span>
8 0
3 years ago
-y+31-5y-15 need help with this
iogann1982 [59]
-2 x (3y - 8) would be the answer

4 0
2 years ago
Read 2 more answers
Number of boys : Number of girls = 11 : 9
Oliga [24]
The first thing we are going to do for this case is define variables.
 We have then:
 x = Number of boys
 y = Number of girls
 We now write the system of equations:
 x / y = 11/9
 x = y + 124
 Solving the system we have:
 x = 682
 y = 558
 The number of students is:
 x + y = 682 + 558 = 1240
 Answer:
 
the total students in the school is:
 
1240 students
8 0
3 years ago
Which shows two expressions that are equivalent to (- 8) (- 12) (2)?
bonufazy [111]

Answer: D (-8)(-24) and (-16)(-12)

Step-by-step explanation:

The first expression is equivalent to 192

Therefore, both must be positive which eliminates answer A, B, and C

Therefore the answer must be D

8x24 = 192

16x12=192

6 0
2 years ago
Read 2 more answers
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