Questions on Geometry: Polygons answered by real tutors!

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Question 711856: totally messed up a quiz today and I am not sure what I did wrong...just want to understand before I retake another quiz.
Question: determin whether quadrilateral ABCD with the given coordinates is a trapezoid parallelogram, rectangle or none of these. Show all your work and explain decision. A (4,0) B(12,4) C(10,8) D (2,4)
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Question 713318: how many sides does a regular polygon have if the measure of each interior angle is 150 degrees?
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Question 714177: The measure of each interior angle of a regular polygon is eight times that of an exterior angle. How many sides does the polygon have?
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Question 714563: What does one side of a regular decagon equal?
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Question 714563: What does one side of a regular decagon equal?
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Question 714452: Can two segments form a polygon?
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Question 715144: Calculate the exterior angle of a regular polygon in which the interior angle is five times the exterior angle. Hence state the number of sides in the polygon. Please help =).
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Question 715156: How many sides has a polygon in which the sum of the interior angles of the polygon is twice the sum of its exterior angles?
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Question 715148: A polygon has n sides. Two of its angles are right angles. Each of the remaining angles equal to 150 degrees. calculate n. Please help! =)
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Question 716363: what is the number of sides of a regular polygon whose interior angles measure 135 degrees?
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Question 716909: If the ratio of the corresponding side lengths of two similar polygons is 6:11, what is the ratio of their areas?
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Question 717396: the sum of the measures of the interior angles of a polygon is five times the sum of the measures of its exterior angles. How many sides the polygon have?
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Question 719107: a regular polygon has 14 sides. what is the measure of each vertex?
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Question 719165: In parallelogram MATH , the ratio of MA to AT is 4:2. Find MA if thr perimeter is 60
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Question 719464: The measure of one interior angle of a regular polygon is two times the measure of one of its exterior angles. How many sides does this polygon have?
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Question 720357: how do i find the measure of and exterior angle of a regular 56-gon?
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Question 721189: 1- CALCULATE THE SIZE OF EXTERIOR ANGLES OF A REGULAR POLYGON WHICH HAS INTERIOR ANGLES OF:
a) 150 degrees
b) 175 degrees
c) 162 degrees
d) 174 degrees
2- the size of the exterior angle of a regular polygon is 12 degrees. how many sides does this polygon have?
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Question 722546: the area of a triangular flag which has its 2 sides equal 2700sq what is the perpendicular distance from the tip of the flag to the third side which is 60cm in length?
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Question 723211: find measure of an interior angle and an exterior angle of a regular hexagon
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Question 723460: 1. What is the sum of the measures of the interior angles of a nonagon?
A 360°
B 540°
C 1260°
D 1620o
2. What is the sum of the measures of the interior angles of a hexagon?
A 360°
B 720°
C 1080°
D 1800°
3. What is the measure of each exterior angle of a regular quadrilateral?
A 45°
B 90°
C 180°
D 360o
4. What is the measure of each exterior angle of a regular triangle?
A 60°
B 120°
C 180°
D 360°
5. What is the measure of each interior angle of a regular pentagon?
A 72°
B 120°
C 108°
D 360°
6. What is the measure of each interior angle of a regular decagon?
A 36°
B 144°
C 180°
D 360°
7. What is the sum of the measures of the exterior angles of an octagon?
A 45°
B 135°
C 360°
D 1800°
8. What is the sum of the measures of the exterior angles of a dodecagon?
A 30°
B 150°
C 360°
D 1800°
9. How many sides does a regular polygon have if each of its interior angles measure 120°?
A 5
B 6
C 8
D 10
10. How many sides does a regular polygon have if each of its interior angles measure 108°
A 5
B 6
C 8
D 10

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Question 724520: A Regular decagon A,B,C,D,E,F,G,H,I,J is in the x-y plane.Measure of angle ADH in degrees is ?
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Question 724661: Consider a circle of radius 1, and corresponding inscribed and circumscribed polygons with the number of sides n = 3, 4, 5, 6, and 8.
As n gets larger, what happens to the ratio of these pairs of perimeters (use the larger perimeter as the numerator, and the smaller perimeter as the denominator)?
Both perimeters tend toward a limiting value as n gets larger and larger. What number would this be?
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Question 724694: consider a circle of radius 1, and corresponding inscribed and circumscribed polygons with the number of sides n = 3, 4, 5, 6, and 8.
Both perimeters tend toward a limiting value as n gets larger and larger. What number would this be?
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Question 725214: a square is inscribed in a circle if one side of the square measures 5cm what s the circumference of the circle
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Question 725369: A polygon has m sides. If one of its interior angles is 80 degrees, and the other interior angles are each equal to 160 degrees, find the value of m.
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Question 725819: How do i do
6X=5
9y-2x=7
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Question 726765: John is drawing a regular polygon. He has drawn two sides with an exterior angle measure of 45°, as shown below.
When John completes his regular polygon, what will be the sum, in degrees, of the measures of the interior angles?
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Question 727538: Quadrilateral ABCD has vertices A( -6, -2 ), B( 0, -2), C( 4, 2), and D( 2, 6). What type of quadrilateral is ABCD? Explain your reasoning.
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Question 727547: how do you work out sides of regular pentagon
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Question 727836: regular hexagon ABCDEF with diagonal AC and exterior angle 1
Prove: m<2+m<3=m<1
**Note <2 is located at I would place greater value on understanding the method rather than just the answer. Please help
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Question 728680: A regular pentagon and a regular hexagon share a vertex, as shown below.
What is the value of the angle measure (7x − 19)°, in degrees?
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Question 729078: For the trapezoid shown, the ratio m
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Question 729701: what is the exterior angle of a Enneadecagon?
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Question 733811: 3. If a hexagon has a radius (center to point of angle) of 6, what is the side of the hexagon?
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Question 735260: casey has a 13 inch television and a 52 inch television in her home. What is the ratio of the sizes of the smaller and larger tvs?
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Question 735263: which statement is NOT true for all rectangles?
A. The diagonals are congruent and bisect each other.
B. Opposite sides are congruent and parallel.
C. The diagonals are perpendicular.
D.Opposite anglers are congruent.
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Question 735266: The diagonal of a square is 56 centimeters long. Find the perimeter of the square to the nearest tenth.
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Question 735286: What is the length of one side of a regular pentagon if its perimeter is 20 cm?
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Question 735774: how do i find the perimeter and are of the polygon 35m, 14m, 29m, 14m? and in the middle it has 8m?
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Question 736061: what is the difference between finding the sum of the interior angles of a polygon and finding the sum of the exterior angles of a polygon.

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Question 738463: if someone says the length is 40 what is a perminator of a hexagon
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Question 739054: For this exercise, consider a circle of radius 1, and corresponding inscribed and circumscribed polygons with the number of sides n = 3, 4, 5, 6, and 8.
For each n = 3, 4, 5, 6 & 8, what are the perimeters of the inscribed and circumscribed polygons with n sides?
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Question 739768: So I have a parallelogram (the top is A B the bottom is D C) and angle A says (3x+10)andlge B says (8x+5) angle D says 5y. angle C says nothing. I was wondering how I am supposed to solve this when andlge D and B have diff letter names and nothing matches A. Thanks:)
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Question 740789: a = 33, b = 11, c =
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