...contain a given angle. 3. In any triangle the square of a side opposite an acute angle equals the sum of the squares on the other two sides minus twice the product of one of these sides by the projection of the other upon it. 4. The length of a tangent to a circle,...

...THEOREM XI 406. In any triangle, the square on the side opposite an acute angle is equal to the sum of the squares on the other two sides minus twice the product of one of these sides and the projection of the oiher sule upon it. AA Given : A ABC, an acute ZC, and...

...Cosines prove that the square on the side opposite an acute angle of a triangle is equal to the sum of the squares on the other two sides minus twice the...40', find the two diagonals. 15. In the parallelogram A1U'1J, given AB = 7iu., ЛC = 10iu., and ¿ВАC = 36° 7', find the side BC and the diagonal BD....

...side. Theorem XI. In any triangle the square on the side opposite an acute angle is equal to the sum of the squares on the other two sides, minus twice the product of one of these sides by the projection of the other side upon it. 1. Of what subject matter does Chapter...

...side. Theorem XI. In any triangle the square on the side opposite an acute angle is equal to the sum of the squares on the other two sides, minus twice the product of one of these sides by the projection of the other side upon it. 1. Of what subject matter does Chapter...