Everyday Math

长度和面积

Geometry Shortcuts

True or false?

A circle can be inscribed in a kite.

What is the value of y y in the diagram shown? (HINT: Think ratios)

Given the two circles with center P and the equilateral triangle shown, if the value of x , x, the radius of the larger circle, is 8, what is the value of y , y, the radius of the smaller circle?

In the triangle shown, the three line segments meet at the centroid of the triangle. How many times greater is the product a b c abc than the product x y z ? xyz? (HINT: The centroid of a triangle trisects each line segment)

Given that AB is the diameter of the circle shown with center at O , O, what is the approximate value of AC?

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