Elementary Geometry for College Students
7th Edition
ISBN: 9780357746936
Author: Daniel C. Alexander; Geralyn M. Koeberlein
Publisher: Cengage Limited
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Chapter 7.CT, Problem 3CT
To determine
To draw and describe:
The locus of points in the plane that are equidistant from the endpoints of
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Given: ABBC and D is the midpoint of AC.
Prove: ABD ≈ ACBD.
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Step
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AB ≈ BC
Reason
1
Given
D is the midpoint of AC
2
BD BD
3
ADDC
Calculating Volume (Mixed)
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5
4
AABC is an isosceles triangle
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Reflexive Property
A midpoint divides a segment into two congruent
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The triangle has two congruent sides
In a triangle, angles opposite of congruent sides are
congruent
An angle bisector divides an angle into two
congruent angles
B
*
A
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Note: the segment AC is a straight segment.
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Stonehenge is a British landmark made of huge stones arranged in a circular pattern that reflects
the movements of Earth and the moon. The diagram shows that the angle formed by the north/south
axis and the line aligned from the station stone to the northmost moonrise position measures 23.5°.
a. Find measure of arc BC.
b. Is arc ABC semicircle? Explain.
c. If the circle measures about 100 feet across, approximately how far would you walk around
the circle from point B to point
sarsen circle
B
station stone
trilithons
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Chapter 7 Solutions
Elementary Geometry for College Students
Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 3ECh. 7.1 - In Exercises 3 to 8, use the drawing provided....Ch. 7.1 - Prob. 5ECh. 7.1 - Prob. 6ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...
Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 12ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 15ECh. 7.1 - Prob. 16ECh. 7.1 - Prob. 17ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 20ECh. 7.1 - Prob. 21ECh. 7.1 - Prob. 22ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 24ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 26ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 28ECh. 7.1 - Prob. 29ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 33ECh. 7.1 - Prob. 34ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 38ECh. 7.1 - Prob. 39ECh. 7.1 - Prob. 40ECh. 7.1 - Note: Exercises preceded by an asterisk are of a...Ch. 7.1 - Prob. 42ECh. 7.1 - Prob. 43ECh. 7.1 - Prob. 44ECh. 7.1 - In Exercises 39 and 42, refer to the line segments...Ch. 7.1 - Prob. 46ECh. 7.1 - In Exercises 39 and 42, refer to the line segments...Ch. 7.1 - Prob. 48ECh. 7.2 - Note: Exercise preceded by an asterisk are of a...Ch. 7.2 - Note: Exercises preceded by an asterisk are of a...Ch. 7.2 - Note: Exercises preceded by an asterisk are of a...Ch. 7.2 - Prob. 4ECh. 7.2 - a What is the general name of the point of...Ch. 7.2 - Prob. 6ECh. 7.2 - Which lines or line segments or rays must be drawn...Ch. 7.2 - a Is it really necessary to construct all three...Ch. 7.2 - Which lines, line segments, or rays are used to...Ch. 7.2 - a To locate the orthocenter, is it necessary to...Ch. 7.2 - To locate the centroid of a triangle, is it...Ch. 7.2 - Prob. 12ECh. 7.2 - Prob. 13ECh. 7.2 - Must the centroid of an isosceles triangle lie on...Ch. 7.2 - Draw a triangle and, by construction, find its...Ch. 7.2 - Prob. 16ECh. 7.2 - Prob. 17ECh. 7.2 - Prob. 18ECh. 7.2 - Draw an obtuse triangle and, by construction, find...Ch. 7.2 - Prob. 20ECh. 7.2 - Prob. 21ECh. 7.2 - Is the incenter always located in the interior of...Ch. 7.2 - Prob. 23ECh. 7.2 - Find the length of the radius of the inscribed...Ch. 7.2 - Find the distance from the circumcenter to each...Ch. 7.2 - A triangle has angles measuring 30, 30, and 120....Ch. 7.2 - In MNP, medians MB, NA and PC intersect at...Ch. 7.2 - Prob. 28ECh. 7.2 - Given: Isosceles RST RS=RT=17andST=16. Medians RZ,...Ch. 7.2 - Given: Isosceles RST RS=RT=10andST=16. Medians RZ,...Ch. 7.2 - Prob. 31ECh. 7.2 - Prob. 32ECh. 7.2 - Prob. 33ECh. 7.2 - Does a rectangle have a an incenter? b a...Ch. 7.2 - Does a square have a an incenter? b a...Ch. 7.2 - Prob. 36ECh. 7.2 - Does a rhombus have a an incenter? b a...Ch. 7.2 - Does a isosceles trapezoid have a an incenter?.b a...Ch. 7.2 - In ABC, the bisectors of the angle are concurrent...Ch. 7.2 - In ABC, the altitudes are concurrent at point D....Ch. 7.2 - A distributing company plans an Illinois location...Ch. 7.2 - There are plans to locate a disaster response...Ch. 7.2 - A circle is inscribed in an isosceles triangle...Ch. 7.2 - Prob. 44ECh. 7.2 - Prob. 45ECh. 7.2 - Prob. 46ECh. 7.3 - Describe, if possible, how you would inscribe a...Ch. 7.3 - What condition must be satisfied for it to be...Ch. 7.3 - Prob. 3ECh. 7.3 - What condition must be satisfied for it to be...Ch. 7.3 - Prob. 5ECh. 7.3 - In Exercises 5 to 8, perform constructions....Ch. 7.3 - Prob. 7ECh. 7.3 - Prob. 8ECh. 7.3 - Find the perimeter of a regular octagon if the...Ch. 7.3 - In a regular polygon with each side of length 6.5...Ch. 7.3 - Prob. 11ECh. 7.3 - Prob. 12ECh. 7.3 - Find the lengths of the apothem and the radius of...Ch. 7.3 - Find the lengths of the apothem and the radius of...Ch. 7.3 - Prob. 15ECh. 7.3 - Find the lengths of the side and the radius of a...Ch. 7.3 - Find the measure of a central angle of a regular...Ch. 7.3 - Find the measure of a central angle of a regular...Ch. 7.3 - Find the number of sides of a regular polygon that...Ch. 7.3 - Find the number of sides of a regular polygon that...Ch. 7.3 - Find the measure of each interior angle of a...Ch. 7.3 - Find the measure of each interior angle of a...Ch. 7.3 - Prob. 23ECh. 7.3 - Find the measure of each exterior angle of a...Ch. 7.3 - Find the number of sides for a regular polygon in...Ch. 7.3 - Find the number of sides for a regular polygon in...Ch. 7.3 - Is there a regular polygon for which each central...Ch. 7.3 - If possible, draw an equilateral and concave: a...Ch. 7.3 - Prob. 29ECh. 7.3 - Given regular hexagon ABCDEF with each side of...Ch. 7.3 - Given regular octagon RSTUVWXY with each side of...Ch. 7.3 - Given that RSTVQ is a regular pentagon and PQR is...Ch. 7.3 - Given: Regular pentagon RSTVQ with equilateral ...Ch. 7.3 - Given: Regular pentagon JKLMN not shown with...Ch. 7.3 - Is there a regular polygon with 8 diagonals? If...Ch. 7.3 - Prob. 36ECh. 7.3 - Prob. 37ECh. 7.3 - Find the measure of a central angle of a regular...Ch. 7.3 - Prob. 39ECh. 7.3 - A regular polygon of n sides has an exterior angle...Ch. 7.3 - Prob. 41ECh. 7.3 - Prob. 42ECh. 7.CR - In Review Exercises 1 to 6, use the figure shown....Ch. 7.CR - Prob. 2CRCh. 7.CR - In Review Exercises 1 to 6, use the figure shown....Ch. 7.CR - Prob. 4CRCh. 7.CR - Prob. 5CRCh. 7.CR - Prob. 6CRCh. 7.CR - Prob. 7CRCh. 7.CR - Prob. 8CRCh. 7.CR - Prob. 9CRCh. 7.CR - Prob. 10CRCh. 7.CR - Prob. 11CRCh. 7.CR - Prob. 12CRCh. 7.CR - Prob. 13CRCh. 7.CR - Prob. 14CRCh. 7.CR - Prob. 15CRCh. 7.CR - Prob. 16CRCh. 7.CR - Prob. 17CRCh. 7.CR - Prob. 18CRCh. 7.CR - Prob. 19CRCh. 7.CR - Prob. 20CRCh. 7.CR - Prob. 21CRCh. 7.CR - Prob. 22CRCh. 7.CR - Prob. 23CRCh. 7.CR - Prob. 24CRCh. 7.CR - Prob. 25CRCh. 7.CR - Prob. 26CRCh. 7.CR - Prob. 27CRCh. 7.CR - In a regular polygon, each central angle measures...Ch. 7.CR - Prob. 29CRCh. 7.CR - Prob. 30CRCh. 7.CR - Can a circle be inscribed in each of the following...Ch. 7.CR - The length of the radius of a circle inscribed in...Ch. 7.CR - Prob. 33CRCh. 7.CR - Prob. 34CRCh. 7.CT - Prob. 1CTCh. 7.CT - Draw and describe the locus of points in the plane...Ch. 7.CT - Prob. 3CTCh. 7.CT - Prob. 4CTCh. 7.CT - Prob. 5CTCh. 7.CT - Prob. 6CTCh. 7.CT - For a given triangle such as ABC, what word...Ch. 7.CT - In what type of triangle are the angle bisectors,...Ch. 7.CT - Prob. 9CTCh. 7.CT - Prob. 10CTCh. 7.CT - Prob. 11CTCh. 7.CT - Prob. 12CTCh. 7.CT - Prob. 13CTCh. 7.CT - For a regular octagon, the length of the apothem...Ch. 7.CT - For a regular hexagon ABCDEF, the length of side...Ch. 7.CT - For rectangle MNPQ, points A, B, C and D are the...Ch. 7.CT - Prob. 17CT
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