Omi67

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The volume of a cube is nuemrically equal to the surface area of a cube.  What is the side length of the cube?

The rectangle in the diagram has an area equal to 640 \text{cm}^2cm2.

Points B and F are midpoints of sides AC and AE, respectively.

What is the area of triangle BDF in \text{cm}^2?cm2?

In a large equilateral triangle, we draw the incircle. We then draw a smaller equilateral triangle in the incircle.

What is the ratio of the area of the smaller equilateral triangle to that of the larger equilateral triangle?

△ABC is a right triangle and line segment AD is an altitude.
If AB = 10 and BD = 8 then what is the area of \△ABC?

1,5l Gebräu haben 48% Alkohol. Wieviel Alkohol sind es noch, wenn man 0,5l Wasser dazugiesst?

If the points (k, k + 2), (0, k - 6), (k - 4, k) all lie on the same line, find k.

Find the area of the triangle whose vertices are O(0,0), A(6,3) and B(1, -7).

Circle A and circle B are concentric. A chord of circle A that is tangent to circle B has a length that is twice the radius of circle B. What is the ratio of the area of circle A to the area circle B?