член: civonamzuk

33 Questions
449 Answers

378

+1694

Hard Geometry

An equilateral triangle ABC is partly inscribed in a circle with diameter AB (See diagram).
The area of a triangle outside of a circle is equal to 1 square unit. Find the length of AB.
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civonamzuk 7 февр. 2022 г.

455

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Geometry

Square ABCD has an area of x cm2. An isosceles triangle AEF has an area of 1/4x cm2. Find the area of a quadrilateral ADGE as a fraction in terms of x.

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civonamzuk 19 июн. 2021 г.

445

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Geometry

In a triangle ABC, AD = 3 cm, and [ABC] = 162/3 cm2. Find the ratio of [ACD] to [BCD].

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civonamzuk 9 июн. 2021 г.

518

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Folded rectangle

In rectangle ABCD, AB = 10 and BC = 4. The rectangle is folded so that points A and C coincide, forming the pentagon BCDEF. What is the area of that pentagon?

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civonamzuk 21 мая 2021 г.

519

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Geometry

Find the length of BC.

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civonamzuk 20 мая 2021 г.

1726

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What's the lowest temperature...

What's the lowest temperature of these three: - 40ºF, 233.16K or - 40ºC ?

Dragonlance ●●●●●●●●●●●●●●●

civonamzuk 12 июн. 2015 г.

1401

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A pair of the identical circles are overlapping each other. Their diameter (D) is 20cm, and the distance between the centers is 10cm. In the

A pair of the identical circles are overlapping each other. Their diameter (D) is 20cm, and the distance between the centers is 10cm. In the grey area, it is possible to inscribe only two golden rectangles - different in size.
Can you find прочитайте больше ..

heureka ●●

civonamzuk 11 июн. 2015 г.

1603

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How many turquoise squares will be required to build the twentieth figure in this pattern?

How many turquoise squares will be required to build the twentieth figure in this pattern?

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heureka ●●

civonamzuk 31 мая 2015 г.

1774

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The area of the equilateral triangle ABE = sin60o(cm2). Line segment AI = 5cm. BF = EF ; find the area DEGHI.

The area of the equilateral triangle ABE = sin600(cm2). Line segment AI = 5cm. BF = EF =CI =DI ; find the area of the polygon DEGHI.

heureka ●●●●●●

civonamzuk 29 мая 2015 г.

2311

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How many triangles are there in the given figure?

Lunar ●●●

civonamzuk 28 мая 2015 г.

2411

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A man wishes to reach the island in the middle of an ornamental lake without getting wet. The island is 20 feet from each edge of the pond (

A man wishes to reach the island in the middle of an ornamental lake without getting wet. The island is 20 feet from each edge of the pond (see diagram) and he has two planks each 19 feet long. How does he get across? прочитайте больше ..

CPhill ●●●●●●●●

civonamzuk 26 мая 2015 г.

1062

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You have an equal-arm balance scale and twelve solid bs. You are told that one of the bs has a different weight from all the others, b

You have an equal-arm balance scale and twelve solid b***s. You are told that one of the b***s has a different weight from all the others, but you do not know whether it is lighter or heavier. You can weigh the b***s against each other in the scale balance. прочитайте больше ..

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civonamzuk 26 мая 2015 г.

+1694

You need to specify which side of a triangle is 20.

civonamzuk28 мар. 2015 г.

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civonamzuk28 мар. 2015 г.

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civonamzuk28 мар. 2015 г.

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civonamzuk27 мар. 2015 г.

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civonamzuk27 мар. 2015 г.

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civonamzuk27 мар. 2015 г.

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civonamzuk27 мар. 2015 г.

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civonamzuk27 мар. 2015 г.

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civonamzuk24 мар. 2015 г.

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civonamzuk24 мар. 2015 г.

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