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01 May 2020, 03:17
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
20% (01:28) correct
80%
(01:47)
wrong
based on 129
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A circle is inscribed in a quadrilateral ABCD such a way that it touches all of the four sides. What is the perimeter of the quadrilateral?
(1) AB + BC = 10
(2) AB + CD = 12
Are You Up For the Challenge: 700 Level Questions
(1) AB + BC = 10
(2) AB + CD = 12
Are You Up For the Challenge: 700 Level Questions
Given a quadrilateral ABCD, a circle is inscribed in the quadrilateral in such a way that it touches all of the four sides. What is the perimeter of the quadrilateral?
01 May 2020, 23:35
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Bunuel
Properties at Use:
- Two tangents can be drawn to circle from one point
- Both tangents drawn to a particular circle from one particular point will have equal lengths.
- If all 4 sides of quadrilateral are tangents to a circle then AB + CD = BC + CA
- Two tangents can be drawn to circle from one point
- Both tangents drawn to a particular circle from one particular point will have equal lengths.
- If all 4 sides of quadrilateral are tangents to a circle then AB + CD = BC + CA
Answer: Option B
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Screenshot 2020-05-02 at 12.00.50 PM.png [ 889.23 KiB | Viewed 4150 times ]
General Discussion
01 May 2020, 22:59
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Two tangent segments are drawn to one circle from the same external point, then they are equal.
Perimeter of quadrilateral ABCD = a+b+b+c+c+d+d+a = 2(a+b+c+d) = 2(AB+CD) = 2(BC+AD)
Basically our question stem is whether we know AB+CD or BC+AD
Statement 2 gives us the value of one of the above.
B
Perimeter of quadrilateral ABCD = a+b+b+c+c+d+d+a = 2(a+b+c+d) = 2(AB+CD) = 2(BC+AD)
Basically our question stem is whether we know AB+CD or BC+AD
Statement 2 gives us the value of one of the above.
B
Bunuel
Attachments
Untitled.png [ 5.48 KiB | Viewed 4158 times ]
