Miembros: 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.
lee mas ..

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civonamzuk 7 feb 2022

455

+1694

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 jun 2021

444

+1694

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 jun 2021

518

+1694

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?

lee mas ..

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civonamzuk 21 may 2021

518

+1694

Geometry

Find the length of BC.

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civonamzuk 20 may 2021

1726

+1694

What's the lowest temperature...

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

Dragonlance ●●●●●●●●●●●●●●●

civonamzuk 12 jun 2015

1401

+1694

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 lee mas ..

heureka ●●

civonamzuk 11 jun 2015

1603

+1694

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?

lee mas ..

heureka ●●

civonamzuk 31 may 2015

1774

+1694

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 may 2015

2311

+1694

How many triangles are there in the given figure?

Lunar ●●●

civonamzuk 28 may 2015

2410

+1694

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? lee mas ..

CPhill ●●●●●●●●

civonamzuk 26 may 2015

1061

+1694

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. lee mas ..

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civonamzuk 26 may 2015

+1694

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

civonamzuk28 mar 2015

+1694

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civonamzuk28 mar 2015

+1694

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civonamzuk28 mar 2015

+1694

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civonamzuk27 mar 2015

+1694

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civonamzuk27 mar 2015

+1694

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civonamzuk27 mar 2015

+1694

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civonamzuk27 mar 2015

+1694

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civonamzuk27 mar 2015

+1694

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civonamzuk24 mar 2015

+1694

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civonamzuk24 mar 2015

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