# Polygons

• Jan 24th 2007, 06:46 PM
symmetry
Polygons
A set of polygons contains a square, a rectangle, a rhombus and a trapezoid. If one polygon is chosen at random, what is the probability that the polygon has all sides congruent and all right angles?
• Jan 24th 2007, 07:00 PM
AfterShock
Quote:

Originally Posted by symmetry
A set of polygons contains a square, a rectangle, a rhombus and a trapezoid. If one polygon is chosen at random, what is the probability that the polygon has all sides congruent and all right angles?

A square and rhombus are the only polygons with congruent sides.

A square and rectangle are the only polygons with all right angles.

And thus, we want to know which polygon has all sides congruent, as well as all right angles. As shown above, only a square does.

Therefore, there is a 1/4 chance in choosing a polygon that has all sides congruent and all right angles.
• Jan 25th 2007, 12:39 AM
mangaleswaranr
Quote:

Originally Posted by symmetry
A set of polygons contains a square, a rectangle, a rhombus and a trapezoid. If one polygon is chosen at random, what is the probability that the polygon has all sides congruent and all right angles?

the polygon is Square, which is satisfies the condition all sides congruent and all right angles.

total 4 poloygons is there

probablity is 1/4

- R.Mangalesh
• Jan 25th 2007, 04:25 PM
symmetry
ok
I thank you for your help and TIPS.