document.write( "Question 604160: In parallelogram ABCD, base AD is 15 units long and base AB is 8 units long. What are the height and area of ABCD if the measure of angle DAB is 20 degrees? \r
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document.write( "This is a Geometry question, but it is labeled \"Using Trigonometry\". I've only ever done trigonometry with right triangles, not parallelograms.\r
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document.write( "I know that the area of a parallelogram is base * height, and that the base of ABCD is 15. I'm just stumped when it comes to finding the height. \n" );
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Algebra.Com's Answer #381281 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! if the parallelogram is sitting on AB, you can draw an altitude (height) from the end of AD down to AB\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "this forms a right triangle, with AD as the hypotenuse\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "you know angle A, so to find the height ___ h = 8 * sin(20º) \n" ); document.write( " |