What’s the sum of the measures of the exterior angles of a 53-gon?
2 answers:
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Answer:
Exercise 1: The length of the unknown leg is 4 inches.
Exercise 3: The following straws can be used to construct the triangle: b) , c)
, d)
, e)
, f)
Exercise 4: Possible options of this exercise: 1) (2, 4, 5), 2) (4, 5, 6), 3) (5, 6, 10), 4) (1, 2, 11), 5) (1, 4, 11), 6) (1, 10, 11)
Step-by-step explanation:
Exercise 1:
Let suppose that triangle represented in the figure is a right triangle, the length of the missing leg is determined by Pythagorean Theorem:
(1)
Where:
- Hypotenuse, in inches.
- Known leg, in inches.
- Unknown leg, in inches.
If we know that and
, then the length of the unknown leg is:
Since 4 is the least whole number closest to , then we conclude that the length of the unknown leg is 4 inches.
Exercise 3:
The range of possible lengths for the missing side of the triangle is represented by the following simultaneous inequality:
(2)
Where:
- Greater side, in inches.
- Lesser side, in inches.
- Missing side, in inches.
If we know that and
, then we have the following range of missing sides:
The following straws can be used to construct the triangle: b) , c)
, d)
, e)
, f)
Exercise 4:
Let check each pair to determine possible constructions by means of the inequality used in Exercise 3:
(i)
Possible choices: 5 inches.
(ii)
Possible choices: 4 inches, 6 inches.
(iii)
Possible choices: 5 inches, 6 inches.
(iv)
Possible choices: None.
(v)
Possible choices: 2 inches, 6 inches.
(vi)
Possible choices: 5 inches.
(vii)
Possible choices: None.
(viii)
Possible choices: 2 inches, 4 inches, 10 inches.
(ix)
Possible choices: 6 inches.
(x)
Possible choices: 5 inches.
Possible options of this exercise: 1) (2, 4, 5), 2) (4, 5, 6), 3) (5, 6, 10), 4) (1, 2, 11), 5) (1, 4, 11), 6) (1, 10, 11)
Answer:
If we want the greatest portion of pie, then you must choose the section with the greatest angle. Therefore, we must choose Section 2. But if we want the smallest portion of pie, then we must choose Section 1.
Step-by-step explanation:
From statement, we know that measure of the angle ABC is equal to the sum of measures of angles ABD (<em>section 1</em>) and DBC (<em>section 2</em>), that is to say:
(1)
If we know that ,
and
, then the value of
is:
Then, we check the angles of each section:
Section 1
Section 2
If we want the greatest portion of pie, then you must choose the section with the greatest angle. Therefore, we must choose Section 2. But if we want the smallest portion of pie, then we must choose Section 1.