document.write( "Question 715774: the measure of an isosceles triangle are 21, 21, and 8. Find the measure of a base angle to the nearest degree? \n" ); document.write( "

Algebra.Com's Answer #439584 by Alan3354(69443) $\"\"$ $\"About$

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the measure of an isosceles triangle are 21, 21, and 8. Find the measure of a base angle to the nearest degree?
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\n" ); document.write( "The altitude from the vertex bisects the base and forms a right triangle with side = 4 and hypotenuse = 21
\n" ); document.write( "cos(base angle) = 4/21
\n" ); document.write( "angle =~ 79 degs
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