document.write( "Question 1053833: Two internal tangents of two non-overlapping circles with radii 2 cm and 4 cm intersect at right angles. What is the distance between the centers of the circles? \n" ); document.write( "

Algebra.Com's Answer #669239 by ikleyn(52797) $\"\"$ $\"About$

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\n" ); document.write( "Two internal tangents of two non-overlapping circles with radii 2 cm and 4 cm intersect at right angles.
\n" ); document.write( "What is the distance between the centers of the circles?
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\n" ); document.write( "\n" ); document.write( "For the Figure, see the lesson\r
\n" ); document.write( "\n" ); document.write( "    - HOW TO construct a common interior tangent line to two circles \r
\n" ); document.write( "\n" ); document.write( "in this site, or, which is even better, make your own sketch.\r
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\n" ); document.write( "\n" ); document.write( "My theory lessons in this site on circles, their chords, secant and tangent lines are \r
\n" ); document.write( "\n" ); document.write( "    - A circle, its chords, tangent and secant lines - the major definitions \r
\n" ); document.write( "\n" ); document.write( "    - The longer is the chord the larger its central angle is \r
\n" ); document.write( "\n" ); document.write( "    - The chords of a circle and the radii perpendicular to the chords \r
\n" ); document.write( "\n" ); document.write( "    - A tangent line to a circle is perpendicular to the radius drawn to the tangent point \r
\n" ); document.write( "\n" ); document.write( "    - An inscribed angle in a circle \r
\n" ); document.write( "\n" ); document.write( "    - Two parallel secants to a circle cut off congruent arcs \r
\n" ); document.write( "\n" ); document.write( "    - The angle between two chords intersecting inside a circle \r
\n" ); document.write( "\n" ); document.write( "    - The angle between two secants intersecting outside a circle \r
\n" ); document.write( "\n" ); document.write( "    - The angle between a chord and a tangent line to a circle \r
\n" ); document.write( "\n" ); document.write( "    - Tangent segments to a circle from a point outside the circle \r
\n" ); document.write( "\n" ); document.write( "    - The converse theorem on inscribed angles \r
\n" ); document.write( "\n" ); document.write( "    - The parts of chords that intersect inside a circle \r
\n" ); document.write( "\n" ); document.write( "    - Metric relations for secants intersecting outside a circle \r
\n" ); document.write( "\n" ); document.write( "    - Metric relations for a tangent and a secant lines released from a point outside a circle \r
\n" ); document.write( "\n" ); document.write( "    - Quadrilateral inscribed in a circle\r
\n" ); document.write( "\n" ); document.write( "    - Quadrilateral circumscribed about a circle\r
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\n" ); document.write( "\n" ); document.write( "My lessons on solved problems for circles, their chords, secant and tangent lines are \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO bisect an arc in a circle using a compass and a ruler \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO find the center of a circle given by two chords \r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on a radius and a tangent line to a circle \r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on inscribed angles \r
\n" ); document.write( "\n" ); document.write( "    - A property of the angles of a quadrilateral inscribed in a circle \r
\n" ); document.write( "\n" ); document.write( "    - An isosceles trapezoid can be inscribed in a circle \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO construct a tangent line to a circle at a given point on the circle \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO construct a tangent line to a circle through a given point outside the circle \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO construct a common exterior tangent line to two circles \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO construct a common interior tangent line to two circles \r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on chords that intersect within a circle \r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on secants that intersect outside a circle \r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on a tangent and a secant lines released from a point outside a circle \r
\n" ); document.write( "\n" ); document.write( "    - Solved problems on tangent lines released from a point outside a circle\r
\n" ); document.write( "\n" ); document.write( "under the topic Geometry of the section Word problems.\r
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\n" ); document.write( "\n" ); document.write( "You have this free of charge online textbook on Geometry\r
\n" ); document.write( "\n" ); document.write( "    - GEOMETRY - YOUR ONLINE TEXTBOOK\r
\n" ); document.write( "\n" ); document.write( "in this site. \r
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\n" ); document.write( "\n" ); document.write( "The referred lesson is the part of this textbook under the topic \"Properties of circles, inscribed angles, chords, secants and tangents \".\r
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