Look the capital letter shown sort the letters on the chart according to the attributes given some letter may be used more the ones a f e h i k l m n t v w x y z perpendicular, parallel right angles acute angles obtuse angles

How to do this , and can some one explain

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field